| Title | Anomalous Hall effect in magnetic insulator heterostructures: Contributions from spin-Hall and magnetic-proximity effects |
| Authors | Ding, Shilei Liang, Zhongyu Yun, Chao Wu, Rui Xue, Mingzhu Lin, Zhongchong Ross, Andrew Becker, Sven Yang, Wenyun Ma, Xiaobai Chen, Dongfeng Sun, Kai Jakob, Gerhard Klaeui, Mathias Yang, Jinbo |
| Affiliation | Peking Univ, Sch Phys, State Key Lab Mesoscop Phys, Beijing 100871, Peoples R China Johannes Gutenberg Univ Mainz, Inst Phys, Staudinger Weg 7, D-55128 Mainz, Germany Norwegian Univ Sci & Technol, Dept Phys, Ctr Quantum Spintron, NO-7491 Trondheim, Norway Univ Paris Saclay, CNRS, Unite Mixte Phys, Thales, F-91767 Palaiseau, France China Inst Atom Energy, Dept Nucl Phys, Beijing 102413, Peoples R China Grad Sch Excellence Mat Sci Mainz, Staudinger Weg 9, D-55128 Mainz, Germany Collaborat Innovat Ctr Quantum Matter, Beijing 100871, Peoples R China Beijing Key Lab Magnetoelect Mat & Devices, Beijing 100871, Peoples R China |
| Issue Date | 8-Dec-2021 |
| Publisher | PHYSICAL REVIEW B |
| Abstract | In this letter, we study the origin of the anomalous Hall effect (AHE) in ferrimagnetic insulator Tm3Fe5O12 (TmIG)/Pt heterostructures. A monotonic decrease of the anomalous Hall resistivity (ApAHE) with decreasing temperature is observed for TmIG/Pt, and a sign reversal of ApAHEoccurs at around 80 K. With the addition of a Cu interlayer, the ApAHEsimilarly decreases as a function of temperature, but maintains the same sign across the full temperature range. This indicates that both the magnetic-proximity effect and spin Hall effect in the TmIG/Pt bilayer contribute to the AHE signal with opposing signs. The spin-Hall contribution to the AHE is dominant at room temperature but decreases with decreasing temperature. Meanwhile, the magneticproximity contribution to the AHE becomes dominant with decreasing temperatures, leading to a change of sign for ApAHE. We exclude a dominant influence of a ferrimagnetic compensation point in the temperature region by complementary magnetic hysteresis and neutron diffraction measurements. Our work, based on a simple method, sheds light on the origin of the AHE in magnetic insulator heterostructures, where the competition between the magnetic-proximity effect and spin Hall effect governs the sign and amplitude of the AHE. |
| URI | http://hdl.handle.net/20.500.11897/636975 |
| ISSN | 2469-9950 |
| DOI | 10.1103/PhysRevB.104.224410 |
| Indexed | SCI(E) |
| Appears in Collections: | 物理学院 人工微结构和介观物理国家重点实验室 |
