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Title: Chirality switching of an antiferromagnetic spiral wall and its effect on magnetic anisotropy

Abstract

An antiferromagnetic NiO spiral wall in Fe / NiO / C o 0.5 N i 0.5 O / vicinal Ag(001) was created by rotating Fe magnetization and investigated using x-ray magnetic linear dichroism (XMLD). Different from the Mauri's 180° spiral wall, we find that the NiO spiral wall always switches its chirality at ~ 90 ° rotation of the Fe magnetization, and unwinds the spiral wall back to a single domain with a further rotation of the Fe magnetization from 90° to 180°. The effect of this chirality switching on the magnetic anisotropy was studied using rotational magneto-optic Kerr effect (ROTMOKE) on Py / NiO / C o 0.5 N i 0.5 O / vicinal Ag(001). We find that the original Mauri's model has to be corrected by an energy folding due to the chirality switching, which consequently converts the exchange bias from the Mauri's 180° spiral wall into a uniaxial anisotropy and a negative fourfold anisotropy.

Authors:
 [1];  [1];  [2];  [2];  [2];  [1];  [1];  [3];  [4];  [5];  [6]; ORCiD logo [1]
  1. Univ. of California, Berkeley, CA (United States). Dept. of Physics
  2. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
  3. Cornell Univ., Ithaca, NY (United States). Cornell High Energy Synchrotron Source (CHESS)
  4. King Abullah Univ. of Science and Technology, Thuwal (Saudi Arabia). Physical Science and Engineering Division
  5. Korea Research Inst. of Standards and Science, Daejeon (South Korea)
  6. Peking Univ., Beijing (China). School of Physics
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF); King Abdullah University of Science and Technology (KAUST); National Research Foundation of Korea (NRF); National Key Research and Development Program of China
OSTI Identifier:
1634058
Grant/Contract Number:  
AC02-05CH11231; 1504568; 2016-CRG5-2977; 2015M3D1A1070467; 2015R1A5A1009962; 2016YFA0300804; 2017YFA0303303
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Materials
Additional Journal Information:
Journal Volume: 3; Journal Issue: 11; Journal ID: ISSN 2475-9953
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; magnetic anisotropy; magnetic interactions; magnetism

Citation Formats

Li, Q., Yang, M., N'Diaye, A. T., Klewe, C., Shafer, P., Gao, N., Wang, T. Y., Arenholz, E., Zhang, Xixiang, Hwang, C., Li, J., and Qiu, Z. Q.. Chirality switching of an antiferromagnetic spiral wall and its effect on magnetic anisotropy. United States: N. p., 2019. Web. https://doi.org/10.1103/physrevmaterials.3.114415.
Li, Q., Yang, M., N'Diaye, A. T., Klewe, C., Shafer, P., Gao, N., Wang, T. Y., Arenholz, E., Zhang, Xixiang, Hwang, C., Li, J., & Qiu, Z. Q.. Chirality switching of an antiferromagnetic spiral wall and its effect on magnetic anisotropy. United States. https://doi.org/10.1103/physrevmaterials.3.114415
Li, Q., Yang, M., N'Diaye, A. T., Klewe, C., Shafer, P., Gao, N., Wang, T. Y., Arenholz, E., Zhang, Xixiang, Hwang, C., Li, J., and Qiu, Z. Q.. Tue . "Chirality switching of an antiferromagnetic spiral wall and its effect on magnetic anisotropy". United States. https://doi.org/10.1103/physrevmaterials.3.114415. https://www.osti.gov/servlets/purl/1634058.
@article{osti_1634058,
title = {Chirality switching of an antiferromagnetic spiral wall and its effect on magnetic anisotropy},
author = {Li, Q. and Yang, M. and N'Diaye, A. T. and Klewe, C. and Shafer, P. and Gao, N. and Wang, T. Y. and Arenholz, E. and Zhang, Xixiang and Hwang, C. and Li, J. and Qiu, Z. Q.},
abstractNote = {An antiferromagnetic NiO spiral wall in Fe/NiO/Co0.5Ni0.5O/vicinal Ag(001) was created by rotating Fe magnetization and investigated using x-ray magnetic linear dichroism (XMLD). Different from the Mauri's 180° spiral wall, we find that the NiO spiral wall always switches its chirality at ~90° rotation of the Fe magnetization, and unwinds the spiral wall back to a single domain with a further rotation of the Fe magnetization from 90° to 180°. The effect of this chirality switching on the magnetic anisotropy was studied using rotational magneto-optic Kerr effect (ROTMOKE) on Py/NiO/Co0.5Ni0.5O/vicinal Ag(001). We find that the original Mauri's model has to be corrected by an energy folding due to the chirality switching, which consequently converts the exchange bias from the Mauri's 180° spiral wall into a uniaxial anisotropy and a negative fourfold anisotropy.},
doi = {10.1103/physrevmaterials.3.114415},
journal = {Physical Review Materials},
number = 11,
volume = 3,
place = {United States},
year = {2019},
month = {11}
}

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