Noncollinear spin structure in F e3+x C o3-x T i2 (x=0,2,3) from neutron diffraction

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

doi:10.1103/PhysRevMaterials.3.064403

Noncollinear spin structure in F e_3+x C o_3-x T i₂ (x=0,2,3) from neutron diffraction

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

STS Project Technical Systems

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

Neutron powder diffraction has been used to investigate the spin structure of the hard-magnetic alloy Fe3+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. 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.

Original language	English
Article number	064403
Journal	Physical Review Materials
Volume	3
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevMaterials.3.064403
State	Published - Jun 4 2019

Bibliographical note

Publisher Copyright:
© 2019 American Physical Society.

Funding

The experimental research is supported by NSF-DMREF (SusChEM No. 1729288), with theoretical support from DOE-BES (Award No. DE-FG02-04ER46152) and the Nebraska Center for Materials and Nanoscience. The resources at Spallation Neutron Source, a DOE Office of Science User Facility operated by the Oak Ridge National Laboratory, were used in the research. The research at Nebraska was partly performed in the Nebraska Nanoscale Facility, which is supported by NSF through the National Nanotechnology Coordinated Infrastructure initiative (ECCS No. 1542182), and by the Nebraska Research Initiative (NRI). The experimental research is supported by NSF-DMREF (SusChEM No. 1729288), with theoretical support from DOE-BES (Award No. DE-FG02-04ER46152) and the Nebraska Center for Materials and Nanoscience. The resources at Spallation Neutron Source, a DOE Office of Science User Facility operated by the Oak Ridge National Laboratory, were used in the research. The research at Nebraska was partly performed in the Nebraska Nanoscale Facility, which is supported by NSF through the National Nanotechnology Coordinated Infrastructure initiative (ECCS No. 1542182), and by the Nebraska Research Initiative (NRI).

Funders	Funder number
DOE-BES
NRI
NSF-DMREF
Nebraska Research Initiative
National Science Foundation	1729288, 1542182
U.S. Department of Energy	DE-FG02-04ER46152
Norsk Sykepleierforbund

Access to Document

10.1103/PhysRevMaterials.3.064403

Cite this

@article{c141a51672da433bb057b56776ab6aa3,

title = "Noncollinear spin structure in F e3+x C o3-x T i2 (x=0,2,3) from neutron diffraction",

abstract = "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. 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.",

author = "Haohan Wang and Balamurugan Balasubramanian and Rabindra Pahari and Ralph Skomski and Yaohua Liu and Ashfia Huq and Sellmyer, {D. J.} and Xiaoshan Xu",

note = "Publisher Copyright: {\textcopyright} 2019 American Physical Society.",

year = "2019",

month = jun,

day = "4",

doi = "10.1103/PhysRevMaterials.3.064403",

language = "English",

volume = "3",

journal = "Physical Review Materials",

issn = "2475-9953",

publisher = "American Physical Society",

number = "6",

}

TY - JOUR

T1 - Noncollinear spin structure in F e3+x C o3-x T i2 (x=0,2,3) from neutron diffraction

AU - Wang, Haohan

AU - Balasubramanian, Balamurugan

AU - Pahari, Rabindra

AU - Skomski, Ralph

AU - Liu, Yaohua

AU - Huq, Ashfia

AU - Sellmyer, D. J.

AU - Xu, Xiaoshan

PY - 2019/6/4

Y1 - 2019/6/4

N2 - 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. 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.

AB - 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. 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.

UR - http://www.scopus.com/inward/record.url?scp=85067362748&partnerID=8YFLogxK

U2 - 10.1103/PhysRevMaterials.3.064403

DO - 10.1103/PhysRevMaterials.3.064403

M3 - Article

AN - SCOPUS:85067362748

SN - 2475-9953

VL - 3

JO - Physical Review Materials

JF - Physical Review Materials

IS - 6

M1 - 064403

ER -