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Publication Citation: Artifacts that mimic ballistic magnetoresistance

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Author(s): William F. Egelhoff Jr.; L Gan; Erik B. Svedberg; Cedric J. Powell; Alexander J. Shapiro; Robert D. McMichael; J Mallett; Thomas P. Moffat; Mark D. Stiles;
Title: Artifacts that mimic ballistic magnetoresistance
Published: January 01, 2004
Abstract: We have investigated the circumstances underlying recent reports of very large values of ballistic magnetoresistance (BMR) in nanocontacts between magnetic wires. We find that the geometries used are subject to artifacts due to motion of the wires that distort the nanocontact thereby changing its electrical resistance. Since these nanocontacts are often of atomic scale, reliable experiments would require stability on the atomic scale. No method for achieving such stability in macroscopic wires is apparent. We conclude that macroscopic magnetic wires cannot be used to establish the validity of the BMR effect.
Citation: Journal of Magnetism and Magnetic Materials
Volume: 286
Pages: pp. 496 - 500
Keywords: artifacts;Ballistic Magnetoresistance;electrodeposition;Ni wires
Research Areas: Nanomagnetics