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Magnetic structure and phase transition at the surface region of Fe3O4(100)
Journal of Physics Communications Pub Date : 2020-11-21 , DOI: 10.1088/2399-6528/abc8da
Taizo Kawauchi 1 , Yoshio Miura 2 , Kanta Asakawa 1 , Katsuyuki Fukutani 1, 3
Affiliation  

The magnetic structure and phase transition of the near-surface region of Fe3O4(100) was investigated by 57Fe conversion electron Mssbauer spectroscopy (CEMS) and theoretical calculations. It is revealed that at 300 K the magnetization is in-plane in the surface region and cants from the in-plane to the 〈111〉 direction in a deeper region suggesting the presence of a noncollinear magnetic structure. The critical exponents for the tetrahedral and octahedral sites are estimated to be 0.240.01 and 0.280.01, respectively. Near the critical temperature, furthermore, the magnetization direction in the surface region was found to deviate from the in-plane direction.



中文翻译:

Fe 3 O 4(100)表面区域的磁性结构和相变

通过57 Fe转换电子Mssbauer光谱法(CEMS)和理论计算研究了Fe 3 O 4(100)近表面区域的磁性结构和相变。结果表明,在300 K时,磁化在表面区域内处于平面内,而在较深的区域内从平面内向<111>方向倾斜,表明存在非共线磁性结构。四面体和八面体位点的临界指数分别估计为0.240.01和0.280.01。此外,发现在临界温度附近,表面区域中的磁化方向偏离了平面内方向。

更新日期:2020-11-21
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