A neutron diffraction study of half-metallic ferromagnet CrO2 nanorods

Joonghoe Dho; Sanghoon Ki; A. F. Gubkin; J. M.S. Park; E. A. Sherstobitova

doi:10.1016/j.ssc.2009.09.044

A neutron diffraction study of half-metallic ferromagnet CrO₂ nanorods

Joonghoe Dho
, Sanghoon Ki
, A. F. Gubkin
, J. M.S. Park
, E. A. Sherstobitova

Department of Physics

Kyungpook National University
Korea Atomic Energy Research Institute
RAS - Mikheev Institute of Metal Physics, Ural Branch

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

34 Scopus citations

Abstract

Temperature dependent micro-structural and magnetic properties of CrO₂ nanorods have been studied by neutron diffraction from 3.5 K to 450 K. Rietveld analysis considering the anisotropic shape of nanorods suggested that each CrO₂ nanorod probably consisted of a few microscopically oriented grains. Around the ferromagnetic transition temperature (∼395K), a dominant lattice distortion in the tetragonal phase was not a change along the c axis, but a contraction along the ab axes perpendicular to the lengthwise direction of the nanorods, which was caused by an apical bond contraction in CrO₆ octahedra. The obtained structural and magnetic data of CrO₂ nanorods were compared with the temperature dependent resistivity of the epitaxial CrO₂/TiO₂ film, and strong couplings between structural, magnetic, and electric properties in the half-metallic ferromagnet CrO₂ were observed.

Original language	English
Pages (from-to)	86-90
Number of pages	5
Journal	Solid State Communications
Volume	150
Issue number	1-2
DOIs	https://doi.org/10.1016/j.ssc.2009.09.044
State	Published - Jan 2010

Keywords

A. Magnetically ordered materials
C. Crystal structure and symmetry
E. Neutron scattering

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10.1016/j.ssc.2009.09.044

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title = "A neutron diffraction study of half-metallic ferromagnet CrO2 nanorods",

abstract = "Temperature dependent micro-structural and magnetic properties of CrO2 nanorods have been studied by neutron diffraction from 3.5 K to 450 K. Rietveld analysis considering the anisotropic shape of nanorods suggested that each CrO2 nanorod probably consisted of a few microscopically oriented grains. Around the ferromagnetic transition temperature (∼395K), a dominant lattice distortion in the tetragonal phase was not a change along the c axis, but a contraction along the ab axes perpendicular to the lengthwise direction of the nanorods, which was caused by an apical bond contraction in CrO6 octahedra. The obtained structural and magnetic data of CrO2 nanorods were compared with the temperature dependent resistivity of the epitaxial CrO2/TiO2 film, and strong couplings between structural, magnetic, and electric properties in the half-metallic ferromagnet CrO2 were observed.",

keywords = "A. Magnetically ordered materials, C. Crystal structure and symmetry, E. Neutron scattering",

author = "Joonghoe Dho and Sanghoon Ki and Gubkin, \{A. F.\} and Park, \{J. M.S.\} and Sherstobitova, \{E. A.\}",

year = "2010",

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doi = "10.1016/j.ssc.2009.09.044",

language = "English",

volume = "150",

pages = "86--90",

journal = "Solid State Communications",

issn = "0038-1098",

publisher = "Elsevier Ltd.",

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TY - JOUR

T1 - A neutron diffraction study of half-metallic ferromagnet CrO2 nanorods

AU - Dho, Joonghoe

AU - Ki, Sanghoon

AU - Gubkin, A. F.

AU - Park, J. M.S.

AU - Sherstobitova, E. A.

PY - 2010/1

Y1 - 2010/1

N2 - Temperature dependent micro-structural and magnetic properties of CrO2 nanorods have been studied by neutron diffraction from 3.5 K to 450 K. Rietveld analysis considering the anisotropic shape of nanorods suggested that each CrO2 nanorod probably consisted of a few microscopically oriented grains. Around the ferromagnetic transition temperature (∼395K), a dominant lattice distortion in the tetragonal phase was not a change along the c axis, but a contraction along the ab axes perpendicular to the lengthwise direction of the nanorods, which was caused by an apical bond contraction in CrO6 octahedra. The obtained structural and magnetic data of CrO2 nanorods were compared with the temperature dependent resistivity of the epitaxial CrO2/TiO2 film, and strong couplings between structural, magnetic, and electric properties in the half-metallic ferromagnet CrO2 were observed.

AB - Temperature dependent micro-structural and magnetic properties of CrO2 nanorods have been studied by neutron diffraction from 3.5 K to 450 K. Rietveld analysis considering the anisotropic shape of nanorods suggested that each CrO2 nanorod probably consisted of a few microscopically oriented grains. Around the ferromagnetic transition temperature (∼395K), a dominant lattice distortion in the tetragonal phase was not a change along the c axis, but a contraction along the ab axes perpendicular to the lengthwise direction of the nanorods, which was caused by an apical bond contraction in CrO6 octahedra. The obtained structural and magnetic data of CrO2 nanorods were compared with the temperature dependent resistivity of the epitaxial CrO2/TiO2 film, and strong couplings between structural, magnetic, and electric properties in the half-metallic ferromagnet CrO2 were observed.

KW - A. Magnetically ordered materials

KW - C. Crystal structure and symmetry

KW - E. Neutron scattering

UR - https://www.scopus.com/pages/publications/70449134742

U2 - 10.1016/j.ssc.2009.09.044

DO - 10.1016/j.ssc.2009.09.044

M3 - Article

AN - SCOPUS:70449134742

SN - 0038-1098

VL - 150

SP - 86

EP - 90

JO - Solid State Communications

JF - Solid State Communications

IS - 1-2

ER -

A neutron diffraction study of half-metallic ferromagnet CrO₂ nanorods

Abstract

Keywords

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