bluuebunny/crossref_metadata_2025_split huggingface dataset:
Ferrimagnetic-ferromagnetic phase transition in Au-doped Mn4N epitaxial films confirmed by x-ray magnetic circular dichroism
Authors: Horiuchi Takumi , Komori Taro , Yasuda Tomohiro , Hirose Taku , Toko Kaoru , Amemiya Kenta , Suemasu Takashi 
Published: February 2023

The antiperovskite ferrimagnet Mn4N has perpendicular magnetic anisotropy and small spontaneous magnetization, both of which are favorable properties for current induced domain wall motion. Previously we have investigated the magnetic structure of 3d-element-doped Mn4N thin films and demonstrated ultrafast domain wall velocities reaching 3000 m s−1 in the vicinity of the magnetic compensation composition of Ni-doped Mn4N at the current density of j = 1.2 × 1012 A m−2 at room temperature (RT). In this study, we investigate the effect of Au doping on the magnetic structure of Mn4N films, and present a composition ratio-dependent sign reversal of the anomalous Hall effect at RT. X-ray magnetic circular dichroism measurement revealed that the magnetic moment of the face-centered Mn atoms of Mn4−xAuxN reversed between x = 0.1 and 0.2, and became parallel to that of the corner-site Mn atoms for x = 0.2 and 0.3. This result suggests that the ferrimagnetic-ferromagnetic phase transition occurred in Au-doped Mn4N epitaxial films as in the In-doped Mn4N epitaxial films.
Temperature dependent intrinsic Gilbert damping in magnetostrictive FeCoSiB thin film
Authors: Hu Wenbin , Zhang Lei , Jin Lichuan , Bai Feiming 
Published: February 2023

A low Gilbert damping factor is crucial for emerging magneto-acoustic devices. In current work, angle-dependent and temperature-dependent Gilbert damping of magnetostrictive FeCoSiB thin films have been investigated using electron spin resonance (ESR) and vector network analyzer ferromagnetic resonance (VNA-FMR) techniques, respectively. A very low Gilbert damping factor ∼0.0038 was measured with in-plane magnetic fields at room temperature. Temperature-dependent VNA-FMR results between 10 K and 300 K exhibit a conductivity-like damping feature, which can be attributed to the spin-orbital coupling dominantly controlled by the intraband scattering. Our results clearly indicate that highly magnetostrictive or piezomagnetic film does not necessarily have a high intrinsic damping factor.
Analysis and design of constant current and constant voltage outputs of integrated coil wireless EV charging system
Authors: Chen Long , Wu Fei , Ben Tong , Zhang Chunwei 
Published: February 2023

To simplify the circuit design and control complexity, a wireless charging system with a switchable hybrid topology based on an integrated coil structure is proposed in this paper. Constant current (CC) and constant voltage (CV) outputs under zero phase angle (ZPA) conditions can be achieved at a fixed frequency by simply throwing the compensation element at the receiver. Firstly, the system is modeled using mutual coupling theory, and the parameter configuration conditions for implementing CC or CV outputs under ZPA conditions are analyzed. Then, according to the obtained parameter configuration conditions, the parameters of the switchable hybrid topology are designed. Finally, an experimental prototype with 72 V charging voltage and 4 A charging current is implemented to validate the proposal. The experimental results agree well with the theoretical analysis.
The effects of Cu substitution on magnetocaloric effects of the HoCo1−xCuxSi (0 ≤ x ≤ 0.4) phases
Authors: Liu Botao , Zeng Guoqing , Chen Jiamin , Cui Weibin 
Published: February 2023

By hetero-structural alloying ferromagnetic (FM) TiNiSi-type orthorhombic HoCoSi with antiferromagnetic (AFM) Ni2In-type hexagonal HoCuSi, the magnetic and structural evolutions have been observed in HoCo1−xCuxSi (0 ≤ x ≤ 0.4) alloys. The magnetic property is changed from ferromagnetic for x ≤ 0.3 to antiferromagnetic for x = 0.4 in HoCo1−xCuxSi system. With the field change Δμ0H = 5 T, the maximum magnetic entropy changes (−ΔSMmax) are 10.1 J kg−1 K−1, 8.6 J kg−1 K−1, 7.6 J kg−1 K−1, 10.0 J kg−1 K−1 and 13.6 J kg−1 K−1 in HoCo1−xCuxSi (x = 0, 0.1, 0.2, 0.3 and 0.4) alloys, respectively. With the enhancement of substitution amount, the −ΔSMmax is decreased for x ≤ 0.2, which is caused by magnetic moment dilution effects. But the −ΔSMmax is increased for 0.3 ≤ x ≤ 0.4, which is caused by the field-induced metamagnetic transition at the critical component.
Effect of film thickness on the electrical transport in Co2FeAl0.5Si0.5 thin films
Authors: Longchar Lanuakum A. , Rahaman Mainur , Hazra Binoy Krishna , Raja M. Manivel , Rawat R. , Kaul S. N. , Srinath S. 
Published: February 2023

The effect of film thickness on the structural- and electrical-properties is investigated in Co2FeAl0.5Si0.5 (CFAS) thin films of thickness, t, in the range 12–75 nm. These films are grown by ultrahigh vacuum dc magnetron sputtering on Si(100) substrates with SiO2 buffer layer (300 nm), at the substrate temperature of 500 ◦C. The GIXRD patterns reveal that B2 structural order decreases with increasing t. The film with t = 75 nm has sizable A2 disorder. Irrespective of t, ρ(T, H = 0) goes through a minimum at Tmin. An elaborate quantitative analysis of the ρ(T, H = 0) data, taken over the temperature range 5 K to 300 K, demonstrates that the electron-diffuson (e–d) and weak localization (WL) effects (responsible for the negative temperature coefficient of resistivity (TCR) for T &lt; Tmin) compete with the electron-magnon (e–m) and electron–phonon (e–p) scattering (positive TCR) contributions to produce a minimum at Tmin. Residual resistivity, ρ5K, and the e–d, wl, e–m and e–p scattering contributions to ρ(T, H = 0), ρe–d, ρwl, ρe–m and ρe–p, all go through a minimum at t = 50 nm. Regardless of t, the thermal renormalization of the spin-wave stiffness makes a significant contribution to ρe–m.
High wave vector non-reciprocal spin wave beams
Authors: Temdie L. , Castel V. , Dubs C. , Pradhan G. , Solano J. , Majjad H. , Bernard R. , Henry Y. , Bailleul M. , Vlaminck V. 
Published: February 2023

We report unidirectional transmission of micron-wide spin waves beams in a 55 nm thin YIG. We downscaled a chiral coupling technique implementing Ni80Fe20 nanowires arrays with different widths and lattice spacing to study the non-reciprocal transmission of exchange spin waves down to λ ≈ 80 nm. A full spin wave spectroscopy analysis of these high wavevector coupled-modes shows some difficulties to characterize their propagation properties, due to both the non-monotonous field dependence of the coupling efficiency, and also the inhomogeneous stray field from the nanowires.
Study of the anisotropic Sm2Fe17N3 powders with high performance
Authors: Liang Dong , Yang Wenyun , Wang Xinan , Xu Qing , Han Jingzhi , Liu Shunquan , Wang Changsheng , Du Honglin , Zhu Xiaoyu , Yuan Tao , Luo Zhaochu , Yang Jinbo 
Published: February 2023

The strip casting technique was first used in this work to prepare the Sm2Fe17 parent alloys. Next, the Sm2Fe17N3 powders were synthesized using a gas–solid reaction of Sm2Fe17 powders with N2. Then, the anisotropic Sm2Fe17N3 powders with high performance were prepared by a surfactant-assisted grinding method in gasoline solvent. It was found that the coercivity (iHc) of ground powders increases with decreasing the average particle size (Dm), while the saturation magnetization (Ms) decreases. The maximum value of iHc of 17.5 kOe was obtained at the Dm = 1.3 µm. The ground powders with Dm of 3.1 µm show a remanence ratio (Mr/Ms) over 95% and a maximum energy product [(BH)max] of 35 MGOe. The Sm2Fe17N3 powder exhibited a very high iHc of 36.1 kOe at 10 K. Above 300 K, Sm2Fe17N3 powders mixed with epoxy resin showed a low remanence temperature coefficient of α(RT-100°C) = −0.077% °C−1.
Improved soil fertility, plant nutrition and grain yield of soybean and millet following maize intercropped with forage grasses and crotalaria in the Brazilian savanna
Authors: Brito Lucélia de Cássia Rodrigues de , Souza Henrique Antunes de , Araújo Neto Raimundo Bezerra de , Azevedo Diógenes Manoel Pedroza de , Sagrilo Edvaldo , Vogado Renato Falconeres , Carvalho Suzane Pereira , Ferreira Ane Caroline de Melo , Cavigelli Michel André 
Published: February 2023

Context Intercropping maize with tropical forages is known to provide multiple benefits for the agricultural sustainability in the Brazilian savanna. Despite that, more studies are needed to define strategies to improve soil quality and increase crop yield of subsequent crops. Aims This study aimed to evaluate the impacts of cultivating maize in monoculture or in double- and triple-intercropping with brachiaria and crotalaria on the chemical and microbiological attributes of soil, nutritional status of soybean, and the productivity of soybean and millet in succession in the cerrado of eastern Maranhão. Methods The intercropping systems implemented in 2017 were as follows: maize (Zea mays) + Urochloa ruzizienses (brachiaria); maize + Crotalaria juncea (crotalaria); maize + brachiaria + crotalaria; and monoculture maize as a control. In 2018 and 2019, soybean and millet were cultivated on the same plots. Key results The triple-intercropping promoted immediate improvement in the biological and chemical attributes of the soil, especially when compared with monoculture maize. Intercropping maize with brachiaria, with or without crotalaria, increased soybean productivity by 21% and millet by 44% in the subsequent year, compared with monoculture maize system. Intercropping maize with brachiaria, with or without crotalaria, increased the leaf concentrations of nitrogen, potassium, magnesium, and sulfur of the subsequent soybean crop, suggesting improved nutrient cycling with intercropped forages. Conclusions Intercropping maize + forage, especially brachiaria, can be recommended for crop rotation and succession systems in the Brazilian savanna. Implications These results quantified the benefits of crop rotation following intercropping with maize and forage, which can be an alternative for farmers in the Brazilian savanna.
“You know she didn’t have no country”
Authors: Kontovas Nicholas 
Published: February 2023

AbstractThis study focuses on switches into and out of African American English among contestants of the television series RuPaul’s Drag Race. FollowingBarrett (1995), I note that Black contestants who are comfortable in White Middle-Class American English tend to use it as their primary dialect, switching to AAE in order to develop rapport. I suggest that non-Black performers switch into AAE either in order to mitigate the effects of comments which might otherwise be interpreted as rude, or to reinforce strength in moments of emotional self-disclosure, and that this is possibly reflective of an interpretation on the part of the speaker that forwardness and strength constitute a normal element – ‘sass’ – of Black women’s speech. Finally, I explore the possible social impact of this phenomenon from the perspective of two common themes in the popular discourse on race: one centered on cultural appropriation, the other on the perception of Black Women’s Language.
Negotiating normativities of gender, sexuality and the family in gay parents’ small stories
Authors: Mackenzie Jai 
Published: February 2023

AbstractThis article considers how two gay male parents negotiate normative discourses of gender, sexuality and the family in an interview context. Employing a three-level framework for exploring narratives-in-interaction, the micro-linguistic analysis identifies and unravels two gay parents’ multiple layers of self- and other- positioning through their telling of ‘small stories’. The findings support insights from existing sociological and psychological research to some degree, showing how these parents’ liminal situation amidst multiple and intersecting normative discourses can lead to conflict as they work to position themselves as partners, parents, and gay men. However, the analysis also reveals new insights about the specific and nuanced forms such conflict can take, depending on individuals’ circumstances and experiences. The findings suggest that everyday encounters are important sites for the (re)constitution of such normative discourses, and that the small stories parents tell about these encounters can be important resources for making sense of their lives in relation to broader social norms and structures.
The dynamics of bilingualism in language shift ecologies
Authors: Grenoble Lenore A , Osipov Boris 
Published: February 2023

AbstractA large percentage of the world’s languages – anywhere from 50 to 90% – are currently spoken in what we call shift ecologies, situations of unstable bi- or multilingualism where speakers, and in particular younger speakers, do not use their ancestral language but rather speak the majority language. The present paper addresses several interrelated questions with regard to the linguistic effects of bilingualism in such shift ecologies. These language ecologies are dynamic: language choices and preferences change, as do speakers’ proficiency levels. One result is multiple kinds of variation in these endangered language communities. Understanding change and shift requires a methodology for establishing a baseline; descriptive grammars rarely provide information about usage and multilingual language practices. An additional confounder is a range of linguistic variation:regional(dialectal);generational(language-internal change without contact or shift);contact-based(contact with or without shift); andproficiency-based(variation which develops as a result of differing levels of input and usage). Widespread, ongoing language shift today provides opportunities to examine the linguistic changes exhibited by shifting speakers, that is, to zero in on language change and loss in process, rather than as an end product.
Metalinguistic discourse and dialect performance
Authors: Guerra Kathleen S. 
Published: February 2023

AbstractThis investigation examines how dialect identity and linguistic ideologies are negotiated and performed throughdar+gerund, a northern Andean Spanish construction used to express an attenuated request or favor. Specifically, positive, neutral, and negative sentiments expressed through metalinguistic commentary are analyzed from a corpus of 450 tweets collected on Twitter between 2008- May 2019. This analysis shows how a higher degree of emotional intensity in negative sentiments signals linguistic and cultural discrimination towards this Kichwa-contact induced construction. On the other end, positive sentiments celebrate and defend this feature as an intrinsic part of the Andean Ecuadorian dialect and identity. This negotiation of the linguistic and cultural significance ofdar+gerund serves to destabilize dominant negative perceptions and renegotiate the meaning of this NAS feature.
Heritage politics in the case of Black Lives Matter in Bolzano-Bozen, Italy
Authors: Budabin Alexandra Cosima 
Published: February 2023

ABSTRACT
This contribution looks at the Black Lives Matter (BLM) protests that took place in Bolzano-Bozen, the capital of the autonomous province of South Tyrol (Italy). As part of the BLM protests, an iconic statue of Italian cultural heritage was doused with red paint, transmitting a message with local, national, and international resonance. The case demonstrates how the USA BLM diffusion in Europe interacted with the ongoing statue wars to not only advance national level dialogues around racist legacies related to imperialism and colonialism but also specific local grievances. I marshal the concept of ‘ideological vandalism’ to argue that red paint attacks on public monuments can link transnational messages around racism and colonialism with local and national debates particularly regarding participation in heritage politics. This case underscores how claims can arise when national and international sociopolitical debates connected to colonialism and imperialism activate and surface additional local grievances around participation.
Electronic structure characteristics of two-dimensional ferroelectric heterostructures α-In2Se3/ZnSe
Authors: ZhuoLiang Yu , Tao Jiayou , Lin Lang , Xiaoxiang Sun , Zhijun Zou , Fen Li , Yu-Qing Zhao , Biao Liu , Chang Li , Gaohua Liao 
Published: February 2023

Abstract
At present, chips urgently need breakthrough development in the power consumption and integration. The chip integrates billions or even tens of billions of electronic components, such as field effect transistor, diode and so on. Therefore, the research and development of new low-power electronic components with smaller size is an effective method to reduce chip power consumption and improve chip integration. In this paper, the ferroelectric field effect transistor (Fe-FET) based on two-dimensional heterostructures α-In2Se3/ZnSe is proposed. Based on the first principle, the program will analyze the stability and band structure of α-In2Se3/ZnSe under different stacking modes. In the heterojunction, the microphysical mechanism of ferroelectric polarization affecting the electronic structure is revealed from the aspects of charge transfer at the interface and the asymmetric surfaces with different work function. Combined with the non-equilibrium Green’s function transport theory, the transport properties of Fe-FET based on their α-In2Se3/ZnSe will be studied. The application will provide sufficient theoretical support for research and development of the device based on α-In2Se3/ZnSe structure.
Interaction of two Rydberg atoms in the vicinity of an optical nanofibre
Authors: Stourm E , Lepers M , Robert J , Nic Chormaic S , Mølmer K , Brion E 
Published: February 2023

Abstract
We consider two rubidium atoms, prepared in the same S or P Rydberg states, near an optical nanofibre, and we determine their van der Waals interaction potential as a function of their separation along the nanofibre axis, their distance to the nanofibre axis, and their relative azimuthal angle. We compare results obtained through direct diagonalisation of the Hamiltonian (including quadrupolar interaction terms) with second-order perturbation calculations, and we identify which couplings mainly contribute to the potential in the presence of the nanofibre and in free-space. We relate the appearance of new allowed couplings to the broken rotation symmetry around the interatomic axis due to the presence of the fibre. These couplings induce novel features and cause a reshaping of the interaction anisotropy and formation of an interaction potential well for P states near the nanofibre. Our work constitutes an important step in the assessment of Rydberg atom-nanofibre quantum interfaces and devices.
Energy transport and optimal design of noisy Platonic quantum networks
Authors: Javaherian C , Ferrie C 
Published: February 2023

Abstract
Optimal energy transport is one of the primary goals for designing efficient quantum networks. In this work, the maximum energy transport is investigated for three-dimensional quantum networks with Platonic geometries affected by dephasing and dissipative Markovian noise. The network and the environmental characteristics corresponding the optimal design are obtained and investigated for five Platonic networks with 4, 6, 8, 12, and 20 number of sites that one of the sites is connected to a sink site through a Markovian dissipative process. Such optimal designs could have various applications like switching and multiplexing in quantum circuits.
Driving skyrmions with low threshold current density in Pt/CoFeB thin film
Authors: Ojha Brindaban , Mallick Sougata , Panigrahy Sujit , Sharma Minaxi , Thiaville André , Rohart Stanislas , Bedanta Subhankar 
Published: February 2023

Abstract
Magnetic skyrmions are topologically stable spin swirling particle like entities which are appealing for next generation spintronic devices. The expected low critical current density for the motion of skyrmions makes them potential candidates for future energy efficient electronic devices. Several heavy metal/ferromagnetic (HM/FM) systems have been explored in the past decade to achieve faster skyrmion velocity at low current densities. In this context, we have studied Pt/CoFeB/MgO heterostructures in which skyrmions have been stabilized at room temperature (RT). It has been observed that the shape of the skyrmions are perturbed even by the small stray field arising from low moment magnetic tips while performing the magnetic force microscopy (MFM), indicating presence of low pinning landscape in the samples. This hypothesis is indeed confirmed by the low threshold current density to drive the skyrmions in our sample, at velocities of few ∼10 m s−1.
Gauged quintessence
Authors: Kaneta Kunio , Lee Hye-Sung , Lee Jiheon , Yi Jaeok 
Published: February 2023

Abstract
Despite its dominance in the present universe's energy budget, dark energy is the least
understood component in the universe. Although there is a popular model for the dynamical dark
energy, the quintessence scalar, the investigation is limited because of its highly elusive
character. We present a model where the quintessence is gauged by an Abelian gauge symmetry. The
quintessence is promoted to be a complex scalar whose real part is the dark energy field while the
imaginary part is the longitudinal component of a new gauge boson. It brings interesting
characters to dark energy physics. We study the general features of the model, including how the
quintessence behavior is affected and how the solicited dark energy properties constrain its gauge
interaction. We also note that while the uncoupled quintessence models are suffered greatly from
the Hubble tension, it can be alleviated if the quintessence is under the gauge symmetry.
Blue (0.44 µm) and red (1.7 µm) diode laser activated bleaching—dental shade changes determination
Authors: Dostálová T , Kratochvíl J , Jelínková H , Nocar A , Vavříčková L 
Published: February 2023

Abstract
Tooth whitening or bleaching is one of the most common dental procedures that optimize the white color of the teeth and minimize the simultaneous damage to the tooth structure. Light can speed up the whitening process with halogen lamps, light-emitting diodes, plasma arc lamps, and lasers. Our results show that combinations of a teeth whitening agent with laser light irradiation with a 0.44 µm blue laser diode or a 1.7 µm near-IR laser diode accelerate the whitening process not only during tooth irradiation but also within two weeks after the procedure.