Internal field distributions of mesoscopic spin glasses

Magnetoconductance fluctuations are used to extract information about frozen spin configurations in sub-micrometer sized CuMn wires with manganese concentrations of 320 and 1000 atomic ppm (parts per 10 exp 6 ). Measurements with the magnetic field parallel to the wires separate the spin and orbital...

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Bibliographic Details
Published in:Physical review letters 1993-11, Vol.71 (21), p.3537-3540
Main Authors: DE VEGVAR, P. G. N, FULTON, T. A
Format: Article
Language:English
Subjects:
Applied sciences
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Electronic conduction in metals and alloys
Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures
Electronic transport in condensed matter
Electronic transport phenomena in thin films and low-dimensional structures
Exact sciences and technology
Galvanomagnetic and other magnetotransport effects (including thermomagnetic effects)
Localization effects (anderson or weak localization)
Magnetic properties and materials
Metals. Metallurgy
Physics
Spin glasses and other random magnets
Studies of specific magnetic materials
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Summary:Magnetoconductance fluctuations are used to extract information about frozen spin configurations in sub-micrometer sized CuMn wires with manganese concentrations of 320 and 1000 atomic ppm (parts per 10 exp 6 ). Measurements with the magnetic field parallel to the wires separate the spin and orbital field scales. At low temperatures the configurations distort reversibly over a field scale on the order of the bulk exchange field H sub g . The data are used to map out a sample specific internal field distribution to over 30 H sub g .
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.71.3537