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

doi:10.1103/PhysRevMaterials.3.064403

This content will become publicly available on June 4, 2020

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:

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)

Publication Date:: 2019-06-04

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:: 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.

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                    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.

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                    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.

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@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},

  number       = 6,

  volume       = 3,

  place        = {United States},

  year         = {2019},

  month        = {6}

}

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Works referenced in this record:

Giant energy product in nanostructured two-phase magnets
journal, December 1993

Skomski, Ralph; Coey, J. M. D.
Physical Review B, Vol. 48, Issue 21, p. 15812-15816
DOI: 10.1103/PhysRevB.48.15812

A profile refinement method for nuclear and magnetic structures
journal, June 1969

Rietveld, H. M.
Journal of Applied Crystallography, Vol. 2, Issue 2, p. 65-71
DOI: 10.1107/S0021889869006558

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Similar Records

This content will become publicly available on June 4, 2020

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

Abstract

Citation Formats

Giant energy product in nanostructured two-phase magnets journal, December 1993

A profile refinement method for nuclear and magnetic structures journal, June 1969

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

Giant energy product in nanostructured two-phase magnets
journal, December 1993

A profile refinement method for nuclear and magnetic structures
journal, June 1969