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Title: Origin of the spin reorientation transitions in (Fe 1–xCo x) 2B alloys

Abstract

Low-temperature measurements of the magnetocrystalline anisotropy energy K in (Fe 1–xCo x) 2B alloys are reported, and the origin of this anisotropy is elucidated using a first-principles electronic structure analysis. The calculated concentration dependence K(x) with a maximum near x = 0.3 and a minimum near x = 0.8 is in excellent agreement with experiment. This dependence is traced down to spin-orbital selection rules and the filling of electronic bands with increasing electronic concentration. In conclusion, at the optimal Co concentration, K depends strongly on the tetragonality and doubles under a modest 3% increase of the c/a ratio, suggesting that the magnetocrystalline anisotropy can be further enhanced using epitaxial or chemical strain.

Authors:
ORCiD logo [1];  [2];  [3];  [3]; ORCiD logo [4];  [4];  [4];  [4];  [4];  [2]
  1. Univ. of Nebraska-Lincoln, Lincoln, NE (United States)
  2. Ames Lab., Ames, IA (United States)
  3. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  4. Ames Lab., Ames, IA (United States); Iowa State Univ., Ames, IA (United States)
Publication Date:
Research Org.:
Ames Laboratory (AMES), Ames, IA (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); National Science Foundation (NSF)
OSTI Identifier:
1227211
Alternate Identifier(s):
OSTI ID: 1226707; OSTI ID: 1262189
Report Number(s):
IS-J-8575; LLNL-JRNL-673802
Journal ID: ISSN 0003-6951; APPLAB
Grant/Contract Number:  
DMR1308751; Critical Materials Institute; AC02-07CH11358; AC52-07NA27344; DMR-1308751
Resource Type:
Accepted Manuscript
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 106; Journal Issue: 6; Journal ID: ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; carbon dioxide; Brillouin scattering; magnetic anisotropy; epitaxy; Fermi levels; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Belashchenko, Kirill D., Ke, Liqin, Däne, Markus, Benedict, Lorin X., Lamichhane, Tej Nath, Taufour, Valentin, Jesche, Anton, Bud'ko, Sergey L., Canfield, Paul C., and Antropov, Vladimir P. Origin of the spin reorientation transitions in (Fe1–xCox)2B alloys. United States: N. p., 2015. Web. doi:10.1063/1.4908056.
Belashchenko, Kirill D., Ke, Liqin, Däne, Markus, Benedict, Lorin X., Lamichhane, Tej Nath, Taufour, Valentin, Jesche, Anton, Bud'ko, Sergey L., Canfield, Paul C., & Antropov, Vladimir P. Origin of the spin reorientation transitions in (Fe1–xCox)2B alloys. United States. doi:10.1063/1.4908056.
Belashchenko, Kirill D., Ke, Liqin, Däne, Markus, Benedict, Lorin X., Lamichhane, Tej Nath, Taufour, Valentin, Jesche, Anton, Bud'ko, Sergey L., Canfield, Paul C., and Antropov, Vladimir P. Fri . "Origin of the spin reorientation transitions in (Fe1–xCox)2B alloys". United States. doi:10.1063/1.4908056. https://www.osti.gov/servlets/purl/1227211.
@article{osti_1227211,
title = {Origin of the spin reorientation transitions in (Fe1–xCox)2B alloys},
author = {Belashchenko, Kirill D. and Ke, Liqin and Däne, Markus and Benedict, Lorin X. and Lamichhane, Tej Nath and Taufour, Valentin and Jesche, Anton and Bud'ko, Sergey L. and Canfield, Paul C. and Antropov, Vladimir P.},
abstractNote = {Low-temperature measurements of the magnetocrystalline anisotropy energy K in (Fe1–xCox)2B alloys are reported, and the origin of this anisotropy is elucidated using a first-principles electronic structure analysis. The calculated concentration dependence K(x) with a maximum near x = 0.3 and a minimum near x = 0.8 is in excellent agreement with experiment. This dependence is traced down to spin-orbital selection rules and the filling of electronic bands with increasing electronic concentration. In conclusion, at the optimal Co concentration, K depends strongly on the tetragonality and doubles under a modest 3% increase of the c/a ratio, suggesting that the magnetocrystalline anisotropy can be further enhanced using epitaxial or chemical strain.},
doi = {10.1063/1.4908056},
journal = {Applied Physics Letters},
number = 6,
volume = 106,
place = {United States},
year = {2015},
month = {2}
}

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