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Title: Anisotropic magnetoresistance and nontrivial spin Hall magnetoresistance in Pt / α F e 2 O 3 bilayers

Abstract

Magnetic proximity effect has only been conclusively observed in ferromagnet-based systems. We report the observation of anomalous Hall effect and angular-dependent anisotropic magnetoresistance in Pt on antiferromagnetic Pt / α F e 2 O 3 (0001) epitaxial films at 10 K, which provide evidence for the magnetic proximity effect. The Neel order of Pt / α F e 2 O 3 and the induced magnetization in Pt show a unique angular-dependent magnetoresistance compared with all other ferromagnetic and antiferromagnetic systems. In conclusion, a macrospin response model is established and can explain the antiferromagnetic spin configuration and all main magnetoresistance features in the Pt / α F e 2 O 3 bilayers.

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1]
  1. The Ohio State Univ., Columbus, OH (United States)
Publication Date:
Research Org.:
The Ohio State Univ., Columbus, OH (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); NSF MRSEC
OSTI Identifier:
1594164
Report Number(s):
DOE-OSU-01304
Journal ID: ISSN 2469-9950; PRBMDO
Grant/Contract Number:  
SC0001304; DMR-1420451
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 100; Journal Issue: 22; 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; Antiferromagnet; Magnetic proximity effect; Anisotropic magnetoresistance; Anomalous Hall effect; Antiferromagnetism; Spin Hall magnetoresistance; Spin generation

Citation Formats

Cheng, Yang, Yu, Sisheng, Ahmed, Adam S., Zhu, Menglin, Rao, You, Ghazisaeidi, Maryam, Hwang, Jinwoo, and Yang, Fengyuan. Anisotropic magnetoresistance and nontrivial spin Hall magnetoresistance in Pt/α–Fe2O3 bilayers. United States: N. p., 2019. Web. doi:10.1103/PhysRevB.100.220408.
Cheng, Yang, Yu, Sisheng, Ahmed, Adam S., Zhu, Menglin, Rao, You, Ghazisaeidi, Maryam, Hwang, Jinwoo, & Yang, Fengyuan. Anisotropic magnetoresistance and nontrivial spin Hall magnetoresistance in Pt/α–Fe2O3 bilayers. United States. doi:10.1103/PhysRevB.100.220408.
Cheng, Yang, Yu, Sisheng, Ahmed, Adam S., Zhu, Menglin, Rao, You, Ghazisaeidi, Maryam, Hwang, Jinwoo, and Yang, Fengyuan. Mon . "Anisotropic magnetoresistance and nontrivial spin Hall magnetoresistance in Pt/α–Fe2O3 bilayers". United States. doi:10.1103/PhysRevB.100.220408.
@article{osti_1594164,
title = {Anisotropic magnetoresistance and nontrivial spin Hall magnetoresistance in Pt/α–Fe2O3 bilayers},
author = {Cheng, Yang and Yu, Sisheng and Ahmed, Adam S. and Zhu, Menglin and Rao, You and Ghazisaeidi, Maryam and Hwang, Jinwoo and Yang, Fengyuan},
abstractNote = {Magnetic proximity effect has only been conclusively observed in ferromagnet-based systems. We report the observation of anomalous Hall effect and angular-dependent anisotropic magnetoresistance in Pt on antiferromagnetic Pt/α–Fe2O3 (0001) epitaxial films at 10 K, which provide evidence for the magnetic proximity effect. The Neel order of Pt/α–Fe2O3 and the induced magnetization in Pt show a unique angular-dependent magnetoresistance compared with all other ferromagnetic and antiferromagnetic systems. In conclusion, a macrospin response model is established and can explain the antiferromagnetic spin configuration and all main magnetoresistance features in the Pt/α–Fe2O3 bilayers.},
doi = {10.1103/PhysRevB.100.220408},
journal = {Physical Review B},
number = 22,
volume = 100,
place = {United States},
year = {2019},
month = {12}
}

Journal Article:
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