Exploring interfacial exchange coupling and sublattice effect in heavy metal/ferrimagnetic insulator heterostructures using Hall measurements, x-ray magnetic circular dichroism, and neutron reflectometry
Abstract
© 2019 American Physical Society. We use temperature-dependent Hall measurements to identify contributions of spin Hall, magnetic proximity, and sublattice effects to the anomalous Hall signal in heavy metal/ferrimagnetic insulator heterostructures with perpendicular magnetic anisotropy. This approach enables detection of both the magnetic proximity effect onset temperature and the magnetization compensation temperature and provides essential information regarding the interfacial exchange coupling. Onset of a magnetic proximity effect yields a local extremum in the temperature-dependent anomalous Hall signal, which occurs at higher temperature as magnetic insulator thickness increases. This magnetic proximity effect onset occurs at much higher temperature in Pt than W. The magnetization compensation point is identified by a sharp anomalous Hall sign change and divergent coercive field. We directly probe the magnetic proximity effect using x-ray magnetic circular dichroism and polarized neutron reflectometry, which reveal an antiferromagnetic coupling between W and the magnetic insulator. Finally, we summarize the exchange-coupling configurations and the anomalous Hall-effect sign of the magnetized heavy metal in various heavy metal/magnetic insulator heterostructures.
- Authors:
-
- Univ. of California, Los Angeles, CA (United States)
- National Inst. of Standards and Technology, Gaithersburg, MD (United States)
- Univ. of California, Riverside, CA (United States)
- Univ. of California, Los Angeles, CA (United States); Chinese Academy of Sciences (CAS), Beijing (China)
- National Inst. of Standards and Technology, Gaithersburg, MD (United States); Univ. of Tennessee, Knoxville, TN (United States)
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
- Univ. of California, Riverside, CA (United States); King Saud Univ., Riyadh (Saudi Arabia)
- Univ. of California, Los Angeles, CA (United States); Peking Univ., Beijing (China)
- Publication Date:
- Research Org.:
- Energy Frontier Research Centers (EFRC) (United States). Spins and Heat in Nanoscale Electronic Systems (SHINES); Univ. of California, Oakland, CA (United States); Univ. of California, Riverside, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1566688
- Alternate Identifier(s):
- OSTI ID: 1497751; OSTI ID: 1631603
- Grant/Contract Number:
- AC02-05CH11231; SC0012670; S000686
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review B
- Additional Journal Information:
- Journal Volume: 99; Journal Issue: 10; Journal ID: ISSN 2469-9950
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; phonons; thermal conductivity; thermoelectric; spin dynamics; spintronics
Citation Formats
Shao, Qiming, Grutter, Alexander, Liu, Yawen, Yu, Guoqiang, Yang, Chao-Yao, Gilbert, Dustin A., Arenholz, Elke, Shafer, Padraic, Che, Xiaoyu, Tang, Chi, Aldosary, Mohammed, Navabi, Aryan, He, Qing Lin, Kirby, Brian J., Shi, Jing, and Wang, Kang L. Exploring interfacial exchange coupling and sublattice effect in heavy metal/ferrimagnetic insulator heterostructures using Hall measurements, x-ray magnetic circular dichroism, and neutron reflectometry. United States: N. p., 2019.
Web. doi:10.1103/physrevb.99.104401.
Shao, Qiming, Grutter, Alexander, Liu, Yawen, Yu, Guoqiang, Yang, Chao-Yao, Gilbert, Dustin A., Arenholz, Elke, Shafer, Padraic, Che, Xiaoyu, Tang, Chi, Aldosary, Mohammed, Navabi, Aryan, He, Qing Lin, Kirby, Brian J., Shi, Jing, & Wang, Kang L. Exploring interfacial exchange coupling and sublattice effect in heavy metal/ferrimagnetic insulator heterostructures using Hall measurements, x-ray magnetic circular dichroism, and neutron reflectometry. United States. https://doi.org/10.1103/physrevb.99.104401
Shao, Qiming, Grutter, Alexander, Liu, Yawen, Yu, Guoqiang, Yang, Chao-Yao, Gilbert, Dustin A., Arenholz, Elke, Shafer, Padraic, Che, Xiaoyu, Tang, Chi, Aldosary, Mohammed, Navabi, Aryan, He, Qing Lin, Kirby, Brian J., Shi, Jing, and Wang, Kang L. Mon .
"Exploring interfacial exchange coupling and sublattice effect in heavy metal/ferrimagnetic insulator heterostructures using Hall measurements, x-ray magnetic circular dichroism, and neutron reflectometry". United States. https://doi.org/10.1103/physrevb.99.104401. https://www.osti.gov/servlets/purl/1566688.
@article{osti_1566688,
title = {Exploring interfacial exchange coupling and sublattice effect in heavy metal/ferrimagnetic insulator heterostructures using Hall measurements, x-ray magnetic circular dichroism, and neutron reflectometry},
author = {Shao, Qiming and Grutter, Alexander and Liu, Yawen and Yu, Guoqiang and Yang, Chao-Yao and Gilbert, Dustin A. and Arenholz, Elke and Shafer, Padraic and Che, Xiaoyu and Tang, Chi and Aldosary, Mohammed and Navabi, Aryan and He, Qing Lin and Kirby, Brian J. and Shi, Jing and Wang, Kang L.},
abstractNote = {© 2019 American Physical Society. We use temperature-dependent Hall measurements to identify contributions of spin Hall, magnetic proximity, and sublattice effects to the anomalous Hall signal in heavy metal/ferrimagnetic insulator heterostructures with perpendicular magnetic anisotropy. This approach enables detection of both the magnetic proximity effect onset temperature and the magnetization compensation temperature and provides essential information regarding the interfacial exchange coupling. Onset of a magnetic proximity effect yields a local extremum in the temperature-dependent anomalous Hall signal, which occurs at higher temperature as magnetic insulator thickness increases. This magnetic proximity effect onset occurs at much higher temperature in Pt than W. The magnetization compensation point is identified by a sharp anomalous Hall sign change and divergent coercive field. We directly probe the magnetic proximity effect using x-ray magnetic circular dichroism and polarized neutron reflectometry, which reveal an antiferromagnetic coupling between W and the magnetic insulator. Finally, we summarize the exchange-coupling configurations and the anomalous Hall-effect sign of the magnetized heavy metal in various heavy metal/magnetic insulator heterostructures.},
doi = {10.1103/physrevb.99.104401},
journal = {Physical Review B},
number = 10,
volume = 99,
place = {United States},
year = {Mon Mar 04 00:00:00 EST 2019},
month = {Mon Mar 04 00:00:00 EST 2019}
}
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