Noncollinear spin structure in Fe3+xCo3–xTi2 ( x=0,2,3 ) from neutron diffraction

Wang, Haohan; Balasubramanian, Balamurugan; Pahari, Rabindra; Skomski, Ralph; Liu, Yaohua; Huq, Ashfia; Sellmyer, D. J.; Xu, Xiaoshan

doi:10.1103/PhysRevMaterials.3.064403

Title: Noncollinear spin structure in $F e_{3 + x} C o_{3 - x} T i_{2}$ ( $x = 0, 2, 3$ ) from neutron diffraction

Journal Article · Tue Jun 04 00:00:00 EDT 2019 · Physical Review Materials

DOI:https://doi.org/10.1103/PhysRevMaterials.3.064403· OSTI ID:1531241

Wang, Haohan ^[1]; Balasubramanian, Balamurugan ^[1]; Pahari, Rabindra ^[1]; Skomski, Ralph ^[1];

^[2];

^[2]; Sellmyer, D. J. ^[1]; Xu, Xiaoshan ^[1]

Univ. of Nebraska, Lincoln, NE (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Neutron powder diffraction has been used to investigate the spin structure of the hard-magnetic alloy Fe_3+xCo_3–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/D^1/4 power-law dependence of the misalignment angle on the crystallite size.

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Research Organization:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: AC05-00OR22725; FG02-04ER46152

OSTI ID:: 1531241

Alternate ID(s):: OSTI ID: 1524474

Journal Information:: Physical Review Materials, Vol. 3, Issue 6; ISSN 2475-9953

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 5 works

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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

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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