Tsuyoshi Omi

27th April, 2019

The University of Tokyo

Phone: +81-4-7136-3769

Department of Advanced Materials Science

Email: tsuyoshi-omi[at]g.ecc.u-tokyo.ac.jp

Professor Arima & Tokunaga group

Adress: Box608, Kibantou5-1-5, Kashiwanoha,
Kashiwa, Chiba,277-8561, Japan

Education‣ B. En. Department of Applied Physics, The University of Tokyo, 2016.
‣ M. Sc. Department of Advanced Materials Science, The University of Tokyo, 2018.

Research Interests
Multiferroics, Nonreciprocal flow of quasi-particles, Magneto-elastic coupling

Research Experience
Single Crystal Growth‣ Floating Zone Melting Method‣ Flux Method
Macroscopic measurement‣ Magnetization‣ Electric polarization‣ AC permittivity‣ Elastic constant by ultrasonic measurement
Quantum beam measurement‣ Neutron magnetic scattering‣ X-ray scattering
Electron Spin Resonance

Fellowships
Program for Leading Graduate Schools (MERIT), The University of Tokyo (2016/10~)

Awards
Best Poster Award‣ J-Physics International Workshop on Multipole Physics and Related Phenomena,
Iwate Japan, 2017.
‣ Novel Phenomena in Quantum Materials driven by Multipoles and Topology, Japan, 2018.
Master Thesis and Presentation Award‣ Department of Advanced Materials Science, The University of Tokyo, 2018.

Publications & PresentationsPaper
Element selectivity in second-harmonic generation of GaFeO3
by a soft-x-ray free-electron laser
Sh. Yamamoto, T. Omi, H. Akai, Y. Kubota, Y. Takahashi, Y. Suzuki, Y. Hirata, K. Yamamoto, R.
Yukawa, K. Horiba, H. Yumoto, T. Koyama, H. Ohashi, S. Owada, K. Tono, M. Yabashi, E. Shigemasa,
S. Yamamoto, M. Kotsugi, H. Wadati, H. Kumigashira, T. Arima, S. Shin, and I. Matsuda.
Phys. Rev. Lett., 120, 223902 (2018).

Presentations (International conference)
1. Magnetic phase diagram of an orthorhombic Kagomé cobaltite CaBaCo4O7 (poster)
Tsuyoshi Omi, Nobuyuki Abe, Yusuke Tokunaga and Taka-hisa Arima

Topological Phases and Functionality of Correlated Electron Systems (2019/02).
2. Nonreciprocal spin-wave damping in multiferroic GaFeO3 (poster)T. Omi, M. Akaki, N. Abe, Y. Tokunaga, S. Kimura, M. Hagiwara and T. Arima

International Conference on Magnetism, San Francisco (2018).

3. Magnetoelastic coupling in multiferroic CaBaCo4O7 (poster)
Tsuyoshi Omi, Nobuyuki Abe, Yusuke Tokunaga, Taka-hisa Arima

J-Physics 2018, June 27–30, Japan (2018).

4. Observation of a nonreciprocal signal in ferromagnetic resonance in multiferroic GaFeO3
T. Omi, M. Akaki, N. Abe, Y. Tokunaga, S. Kimura, M. Hagiwara and T. Arima(poster) The 9th APCTP Workshop on Multiferroics, Japan (2017).

Presentations (Domestic conference)
1. Antiferromagnetic-to-ferrimagnetic transition in polar magnet CaBaCo4O7 (oral).
T. Omi, Y. Watanabe, N. Abe, A. Nakao, K. Munakata, H. Sagayama, Y. Tokunaga, T. Arima
Japan Physical Society Spring Meeting, 14pS303-9, Kyushu University, (2019/03).

2. Magnetic anisotropy of a detwinned single crystal of CaBaCo4O7 (oral).
T. Omi, N. Abe, Y. Tokunaga, T. Arima
Japan Physical Society Autumn Meeting, 9pB202-14, Doshisya University, (2018/09).

3. Magneto-elastic response in polar ferrimagnet CaBaCo4O7 (oral).
T. Omi, K. Matsuura, N. Abe, Y. Tokunaga, T. Arima
Japan Physical Society Spring Meeting, 25aK404-7, Tokyo University of Science, (2018/03).
4. Observation of nonreciprocal signal in polarized ferromagnetic resonanceof polar ferrimagnet GaFeO3 (oral).
T. Omi, M. Akaki, N. Abe, Y. Tokunaga, S. Kimura, M. Hagiwara and T. Arima
Japan Physical Society Autumn Meeting, 18pH11-4, Iwate University, (2017/09).

Thesis
1. Master thesis, Department of Advanced Materials Science, The University of Tokyo
The nonreciprocal response with excitations of quasi-particles in polar ferrimagnets(In Japanese)