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 - http://www.scopus.com/inward/record.url?scp=70449134742&partnerID=8YFLogxK
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 -