Magnetotransport properties of polycrystalline and epitaxial chromium dioxide nanowires
نویسندگان
چکیده
Temperature dependent magnetotransport measurements were performed on polycrystalline and epitaxial chromium dioxide CrO2 nanowires fabricated using the selective-area growth technique. Polycrystalline nanowires showed a negative temperature coefficient of resistivity at low temperatures because of strong grain boundary scattering. The magnetoresistance MR value exhibited a width dependence, reaching a maximum of 20% for a 150 nm wide wire. In contrast, the MR response of single crystal CrO2 wires was mainly determined by magnetocrystalline and shape anisotropy. © 2008 American Institute of Physics. DOI: 10.1063/1.2836800
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