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Title: Noncollinear spin structure in F e 3 + x C o 3 x T i 2 ( x = 0 , 2 , 3 ) from neutron diffraction

Abstract

Neutron powder diffraction has been used to investigate the spin structure of the hard-magnetic alloy Fe 3+xCo 3–xTi 2 (x = 0,2,3). The materials are produced by rapid quenching from the melt, they possess a hexagonal crystal structure, and they are nanocrystalline with crystallite sizes D of the order of 40 nm. Projections of the magnetic moment onto both the crystalline c axis and the basal plane were observed. The corresponding misalignment angle exhibits a nonlinear decrease with x, which we explain as a micromagnetic effect caused by Fe-Co site disorder. As a result, the underlying physics is a special kind of random-anisotropy magnetism that leads to the prediction of 1/ D 1/4 power-law dependence of the misalignment angle on the crystallite size.

Authors:
 [1];  [1];  [1];  [1]; ORCiD logo [2]; ORCiD logo [2];  [1];  [1]
  1. Univ. of Nebraska, Lincoln, NE (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1531241
Alternate Identifier(s):
OSTI ID: 1524474
Grant/Contract Number:  
AC05-00OR22725; FG02-04ER46152
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review Materials
Additional Journal Information:
Journal Volume: 3; Journal Issue: 6; Journal ID: ISSN 2475-9953
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 36 MATERIALS SCIENCE

Citation Formats

Wang, Haohan, Balasubramanian, Balamurugan, Pahari, Rabindra, Skomski, Ralph, Liu, Yaohua, Huq, Ashfia, Sellmyer, D. J., and Xu, Xiaoshan. Noncollinear spin structure in Fe3+xCo3–xTi2 ( x=0,2,3 ) from neutron diffraction. United States: N. p., 2019. Web. doi:10.1103/PhysRevMaterials.3.064403.
Wang, Haohan, Balasubramanian, Balamurugan, Pahari, Rabindra, Skomski, Ralph, Liu, Yaohua, Huq, Ashfia, Sellmyer, D. J., & Xu, Xiaoshan. Noncollinear spin structure in Fe3+xCo3–xTi2 ( x=0,2,3 ) from neutron diffraction. United States. doi:10.1103/PhysRevMaterials.3.064403.
Wang, Haohan, Balasubramanian, Balamurugan, Pahari, Rabindra, Skomski, Ralph, Liu, Yaohua, Huq, Ashfia, Sellmyer, D. J., and Xu, Xiaoshan. Tue . "Noncollinear spin structure in Fe3+xCo3–xTi2 ( x=0,2,3 ) from neutron diffraction". United States. doi:10.1103/PhysRevMaterials.3.064403. https://www.osti.gov/servlets/purl/1531241.
@article{osti_1531241,
title = {Noncollinear spin structure in Fe3+xCo3–xTi2 ( x=0,2,3 ) from neutron diffraction},
author = {Wang, Haohan and Balasubramanian, Balamurugan and Pahari, Rabindra and Skomski, Ralph and Liu, Yaohua and Huq, Ashfia and Sellmyer, D. J. and Xu, Xiaoshan},
abstractNote = {Neutron powder diffraction has been used to investigate the spin structure of the hard-magnetic alloy Fe3+xCo3–xTi2 (x = 0,2,3). The materials are produced by rapid quenching from the melt, they possess a hexagonal crystal structure, and they are nanocrystalline with crystallite sizes D of the order of 40 nm. Projections of the magnetic moment onto both the crystalline c axis and the basal plane were observed. The corresponding misalignment angle exhibits a nonlinear decrease with x, which we explain as a micromagnetic effect caused by Fe-Co site disorder. As a result, the underlying physics is a special kind of random-anisotropy magnetism that leads to the prediction of 1/D1/4 power-law dependence of the misalignment angle on the crystallite size.},
doi = {10.1103/PhysRevMaterials.3.064403},
journal = {Physical Review Materials},
issn = {2475-9953},
number = 6,
volume = 3,
place = {United States},
year = {2019},
month = {6}
}

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