Interfacial Tm3+ moment-driven anomalous Hall effect in Pt/Tm3Fe5O12 heterostructure

被引：1
|
作者：
Liu, Yu Kuai [1 ,2 ]
Wong, Hon Fai [2 ]
Ng, Sheung Mei [2 ]
Mak, Chee Leung [2 ]
Leung, Chi Wah [2 ]
机构：
[1] Zhaoqing Univ, Coll Elect Informat & Mechatron Engn, Zhaoqing Rd, Zhaoqing 526061, Guangdong, Peoples R China
[2] Hong Kong Polytech Univ, Dept Appl Phys, Hung Hom, Hong Kong, Peoples R China
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2020年 / 501卷
基金：
中国国家自然科学基金;
关键词：
MAGNETIC-PROPERTIES; TEMPERATURE-DEPENDENCE; DIFFRACTION; INSULATOR; GARNETS;
D O I：
10.1016/j.jmmm.2020.166454
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We performed anomalous Hall effect (AHE) measurements in Pt/Tm3Fe5O12 (Pt/TmIG) bilayers grown on (1 1 0) and (1 1 1)-oriented Gd3Ga5O12 (GGG) substrates (Pt/110TmIG and Pt/111TmIG). Qualitative differences were observed in the two sets of samples: at low magnetic fields only Pt/111TmIG displays square AHE loop, while Pt/110TmIG exhibits non-hysteretic AHE behavior. Systematic temperature-dependent AHE measurements in Pt/111TmIG showed double switching events of AHE loops below 30 K, which was attributed to the larger moment of Tm3+ sublattice at low temperatures and was consistent with earlier theoretical calculations [A. Lehmann-Szweykowska et al., Phys. Rev. B 37, 459 (1988)]. Our results confirmed the strong coupling of Tm3+ magnetic moment with the lattice and the crucial role of the interfacial structure, suggesting a way to detect rare earth moment switching in iron garnets by electrical measurements.
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页数：5
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