Magnetocrystalline anisotropy study of Co-substituted M-type strontium hexaferrite single crystals |
| |
Affiliation: | 1. School of Rare Earths, University of Science and Technology of China, Hefei, Anhui, 230026, China;2. Ganjiang Innovation Academy, Chinese Academy of Sciences, Ganzhou, Jiangxi, 341119, China;3. Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China;4. Ningbo Institute of Materials Technology & Engineering, Chinses Academy of Sciences, Ningbo, Zhejiang, 315201, China;5. Innovation Center for Applied Magnetics of Zhejiang Province, Ningbo, Zhejiang, 315201, China |
| |
Abstract: | The study on the magnetocrystalline anisotropy (MA) of La–Co co-substituted strontium hexaferrite (La–Co SrM) shows a joint effect of Fe2+ and Co2+ ions in the enhancement of MA. Since the role of Fe2+ single ion has been studied with La-substituted strontium ferrite, in this work, Co-substituted strontium hexaferrite SrFe12-xCoxO19 (Co-SrM) single crystals were successfully grown for 0 ≤ x ≤ 0.31 by the Na2CO3 flux method to elucidate the anisotropy of Co2+ single ions. Co-substitution in this preparation condition has a limit solubility of 0.31 and enhances uniaxial magnetic anisotropy field HA by 19% for 0.03 = x ≤ 0.11, with a mere loss of 7% of saturation magnetization MS at 5 K. The enhanced HA of Co-SrM is reported for the first time, even higher than that of La–Co SrM, which is suitable to be used as permanent magnets in this concentration range. But with the further substitution of Co, the planar anisotropy of x = 0.31 was observed at 5 K. The potential nonlinear magnetic structure of Co-SrM remains to be discovered for magnetoelectric effects. This work is also of great significance as a complement to the magnetocrystalline anisotropy study of La–Co SrM. |
| |
Keywords: | Strontium hexaferrite Single crystal Magnetic anisotropy Co-substitution |
本文献已被 ScienceDirect 等数据库收录! |
|