Magnetic Proximity Effect and Anomalous Hall Effect in Pt/Y3Fe5-xAlxO12 Heterostructures

被引：15

作者：

Liang, Xiao ^{[1
,2
,4
]}

Shi, Guoyi ^{[3
]}

Deng, Longjiang ^{[1
,4
]}

Huang, Fei ^{[1
,4
]}

Qin, Jun ^{[1
,4
]}

Tang, Tingting ^{[1
,2
]}

Wang, Chuangtang ^{[1
,4
]}

Peng, Bo ^{[1
,4
]}

Song, Cheng ^{[3
]}

Bi, Lei ^{[1
,4
]}

机构：

[1] Univ Elect Sci & Technol China, Natl Engn Res Ctr Electromagnet Radiat Control Ma, Chengdu 610054, Sichuan, Peoples R China

[2] Chengdu Univ Informat Technol, Informat Mat & Device Applicat Key Lab Sichuan Pr, Chengdu 610225, Sichuan, Peoples R China

[3] Tsinghua Univ, Sch Mat Sci & Engn, Key Lab Adv Mat MOE, Beijing 100084, Peoples R China

[4] Univ Elect Sci & Technol China, State Key Lab Elect Thin Films & Integrated Devic, Chengdu 610054, Sichuan, Peoples R China

来源：

PHYSICAL REVIEW APPLIED | 2018年 / 10卷 / 02期

基金：

中国国家自然科学基金; 国家教育部博士点专项基金资助;

关键词：

Crystal symmetry - Iron alloys - Magnetic moments - Pulsed laser deposition - Yttrium iron garnet - Calculations - Spin Hall effect;

D O I：

10.1103/PhysRevApplied.10.024051

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

In this paper, we report an experimental and first-principles calculation study on the anomalous Hall effect (AHE) in Pt/Y3Fe5-xAlxO12 bilayer structures. Using a combinatorial pulsed-laser deposition method, we doped Al3+ ions in the Y3Fe5O12 lattice with different concentrations, which preferentially substitute the tetrahedral Fe3+, leading to significant variation of AHE. A monotonic decrease of anomalous Hall resistance R-AHE with increasing Al3+ doping concentration is observed at a temperature of 5 K, which scales linearly with the magnetic proximity effect- (MPE-)induced magnetic moments in Pt, as calculated using first-principles calculations. Temperature-dependent R-AHE characterizations indicate a sign change in R-AHE at around 100 K, which can be explained by a predominant contribution from spin Hall effect-(SHE-)induced AHE at higher temperatures. Our study demonstrates that the band hybridization and exchange coupling between tetrahedral Fe3+ ions and Pt are the major contributors to the magnetic proximity effect in Pt/YIG heterojunctions.

引用

页数：9

共 42 条

[31] Anomalous Hall effect [J].