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Title: Giant Anisotropy of Gilbert Damping in Epitaxial CoFe Films

Abstract

Tailoring Gilbert damping of metallic ferromagnetic thin films is one of the central interests in spintronics applications. We report a giant Gilbert damping anisotropy in epitaxial $${\mathrm{Co}}_{50}{\mathrm{Fe}}_{50}$$ thin films with a maximum-minimum damping ratio of 400%, determined by broadband spin-torque ferromagnetic resonance as well as inductive ferromagnetic resonance. We conclude that the origin of this damping anisotropy is the variation of the spin orbit coupling for different magnetization orientations in the cubic lattice, which is further corroborated from the magnitude of the anisotropic magnetoresistance in $${\mathrm{Co}}_{50}{\mathrm{Fe}}_{50}$$.

Authors:
 [1];  [2];  [3];  [4];  [5];  [6];  [6];  [3];  [3];  [7];  [3];  [1]
  1. Oakland Univ., Rochester, MI (United States). Dept. of Physics; Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division
  2. Fudan Univ., Shanghai (China). State Key Lab. of Surface Physics. Dept. of Physics
  3. Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division
  4. Argonne National Lab. (ANL), Argonne, IL (United States). Computational Sciences Division
  5. Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division; Illinois Inst. of Technology, Chicago, IL (United States). Dept. of Physics
  6. Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division; Bogazici Univ., Istanbul (Turkey). Dept. of Physics
  7. Fudan Univ., Shanghai (China). State Key Lab. of Surface Physics. Dept. of Physics; Collaborative Innovation Center of Advanced Microstructures, Nanjing (China)
Publication Date:
Research Org.:
Argonne National Laboratory (ANL), Argonne, IL (United States); Oakland Univ., Rochester, MI (United States); Fudan Univ., Shanghai (China); Bogazici Univ., Istanbul (Turkey); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF); National Key Basic Research Program (China); National Key Research and Development Program (China); National Natural Science Foundation of China (NSFC); Program of Shanghai Academic Research Leader (China); Bogazici Univ. Research Fund (Turkey); Scientific and Technological Research Council of Turkey (TÜBİTAK)
OSTI Identifier:
1505133
Alternate Identifier(s):
OSTI ID: 1530068; OSTI ID: 1546199
Grant/Contract Number:  
AC02-06CH11357; DMR-1808892; 2015CB921401; 2016YFA0300703; 11734006; 11474066; 11434003; 17XD1400400; 17B03D3; 2214/A; AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 122; Journal Issue: 11; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; magnetism; magnetization dynamics; spin-orbit coupling; spintronics

Citation Formats

Li, Yi, Zeng, Fanlong, Zhang, Steven S. -L., Shin, Hyeondeok, Saglam, Hilal, Karakas, Vedat, Ozatay, Ozhan, Pearson, John E., Heinonen, Olle G., Wu, Yizheng, Hoffmann, Axel, and Zhang, Wei. Giant Anisotropy of Gilbert Damping in Epitaxial CoFe Films. United States: N. p., 2019. Web. doi:10.1103/PhysRevLett.122.117203.
Li, Yi, Zeng, Fanlong, Zhang, Steven S. -L., Shin, Hyeondeok, Saglam, Hilal, Karakas, Vedat, Ozatay, Ozhan, Pearson, John E., Heinonen, Olle G., Wu, Yizheng, Hoffmann, Axel, & Zhang, Wei. Giant Anisotropy of Gilbert Damping in Epitaxial CoFe Films. United States. https://doi.org/10.1103/PhysRevLett.122.117203
Li, Yi, Zeng, Fanlong, Zhang, Steven S. -L., Shin, Hyeondeok, Saglam, Hilal, Karakas, Vedat, Ozatay, Ozhan, Pearson, John E., Heinonen, Olle G., Wu, Yizheng, Hoffmann, Axel, and Zhang, Wei. Thu . "Giant Anisotropy of Gilbert Damping in Epitaxial CoFe Films". United States. https://doi.org/10.1103/PhysRevLett.122.117203. https://www.osti.gov/servlets/purl/1505133.
@article{osti_1505133,
title = {Giant Anisotropy of Gilbert Damping in Epitaxial CoFe Films},
author = {Li, Yi and Zeng, Fanlong and Zhang, Steven S. -L. and Shin, Hyeondeok and Saglam, Hilal and Karakas, Vedat and Ozatay, Ozhan and Pearson, John E. and Heinonen, Olle G. and Wu, Yizheng and Hoffmann, Axel and Zhang, Wei},
abstractNote = {Tailoring Gilbert damping of metallic ferromagnetic thin films is one of the central interests in spintronics applications. We report a giant Gilbert damping anisotropy in epitaxial ${\mathrm{Co}}_{50}{\mathrm{Fe}}_{50}$ thin films with a maximum-minimum damping ratio of 400%, determined by broadband spin-torque ferromagnetic resonance as well as inductive ferromagnetic resonance. We conclude that the origin of this damping anisotropy is the variation of the spin orbit coupling for different magnetization orientations in the cubic lattice, which is further corroborated from the magnitude of the anisotropic magnetoresistance in ${\mathrm{Co}}_{50}{\mathrm{Fe}}_{50}$.},
doi = {10.1103/PhysRevLett.122.117203},
journal = {Physical Review Letters},
number = 11,
volume = 122,
place = {United States},
year = {Thu Mar 21 00:00:00 EDT 2019},
month = {Thu Mar 21 00:00:00 EDT 2019}
}

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Cited by: 56 works
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Works referencing / citing this record:

Anisotropy of spin-transfer torques and Gilbert damping induced by Rashba coupling
journal, February 2020