## 3 Results and Discussion
### Magnetic Properties and Magnet Performances

Table 4: The magnet density, intrinsic coercivity (iH\({}_{\rm C}\)), coercivity in BH (bH\({}_{\rm C}\)), remanence magnetic flux density (B\({}_{\rm r}\)), and maximum energy product (BH\({}_{\rm max}\)) of the sintered anisotropic magnets. \begin{table}
\begin{tabular}{c c c c c} \hline \hline
**Composition** & **Additives** & \(\rho\) **(g/cm\({}^{3}\))** & **B\({}_{\rm r}\) (G)** & **H\({}_{\rm C}\) (Oe)** \\ \hline \multirow{6}{*}{SrFe\({}_{11.95}\)Li\({}_{0.03}\)Si\({}_{0.03}\)O\({}_{19}\)} & SrCO\({}_{3}\) 0.5 wt\% & 4.92 & 2629 & 2878 \\  & SrCO\({}_{3}\) 0.75 wt\% & 4.93 & 2631 & 2554 \\  & SrCO\({}_{3}\) 1 wt\% & 5.04 & 2459 & 1810 \\ \cline{1-1}  & SrCO\({}_{3}\) 0.5 wt\% + CaCO\({}_{3}\) 0.5 wt\% & 5.04 & 2596 & 2129 \\ \cline{1-1}  & SrCO\({}_{3}\) 1 wt\% + SiO\({}_{2}\) 0.5 wt\% & 4.70 & 2509 & 4149 \\ \cline{1-1}  & SrCO\({}_{3}\) 1 wt\% + Co\({}_{3}\)O\({}_{4}\) 0.5 wt\% & 5.04 & 2375 & 1914 \\ \cline{1-1}  & CaCO\({}_{3}\) 1 wt\% + SiO\({}_{2}\) 0.5 wt\% & 4.80 & 2528 & 4165 \\ \hline \end{tabular}
\end{table} 
Table 3: The sintered sample density (\(\rho\)), remanent magnetization (B\({}_{\rm r}\)), and coercivity (H\({}_{\rm C}\)) of hexarrite samples SrFe\({}_{11.95}\)Li\({}_{0.03}\)Si\({}_{0.03}\)O\({}_{19}\) and Sr\({}_{0.8}\)La\({}_{0.2}\)Fe\({}_{11.75}\)Co\({}_{0.2}\)Li\({}_{0.03}\)Si\({}_{0.03}\)O\({}_{19}\) with different additives sintered at 1230 \({}^{\circ}\)C.  
When the magnetic properties according to \(x\) and \(z\) were evaluated through M-H measurements, the best hard magnetic properties were obtained at \(z=0.5\) with the M\({}_{\rm S}\) value increased by 2.6%. When an anisotropic permanent magnet was prepared and evaluated for the optimal composition SrFe\({}_{11.5}\)Si\({}_{0.03}\)Li\({}_{0.03}\)O\({}_{19}\), Br improved by 2.5% from 4207 to 4314 G compared to the unsubstituted SrM. The maximum energy product (BH\({}_{\rm max}\)) value also increased from 4.24 to 4.46 M-G-Oe. The enhancement of the intrinsic magnetic property of SrM by the substitution of Li-Si, a new composition separate from La-Co, is a promising result and is expected to see further improvement through processing optimization. Conceptualization, Y.-M.K. ; Funding acquisition, Y.-M.K. ; Investigation, Y.-M.K. and [PERSON]-I.Y. ; Methodology, J.-Y.Y., [PERSON]-H.L., and [PERSON]; Project administration, Y.-M.K. and [PERSON]; Software, J.-Y.Y. and [PERSON]-H.L. ; Supervision, Y.-M.K. and S.-I.Y. ; Writing--original draft, [PERSON]-Y.Y. and [PERSON]-M.K. All authors have read and agreed to the published version of the manuscript. This study was supported by the Basic Science Research Capacity Enhancement Project (National Research Facilities and Equipment Center) through the Korea Basic Science Institute funded by the Ministry of Education (Grant No. 2019R1A6C1010047) and by the Korea Basic Science Institute (National Research Facilities and Equipment Center) grant funded by the Ministry of Education (grant No. 2021R1A6C103A367). Not applicable. The authors are grateful to [PERSON] in the R&D Team, Union Materials Corp. for his support of the anisotropic ferrite magnet fabrication. The authors declare no conflict of interest.