Summary
The natural sensitivity of the conductance of mesoscopic-sized samples to the specific scattering potential has been theoretically proposed as a method to explore the complex frozen magnetic order in systems such as spin-glasses. Recent magneto-transport measurements on 1000 ppm CuMn films and wires demonstrate phase coherent electron propagation over 0.4-µm distances. Exploiting the broken time-reversal symmetry of the spin-glass state, a unique magneto-fingerprint of the specific frozen spin-configuration is extracted from a pair of resistance measurements. This technique is then applied to study how the spin configuration changes along different paths in the H — T plane, reaching some surprising conclusions not obtainable by other experimental means.
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© 1992 Springer Japan
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de Vegvar, P.G.N., Lévy, L.P., Fulton, T.A. (1992). Probing Spin-Glass Configurations with Mesoscopic Conductance Fluctuations. In: Namba, S., Hamaguchi, C., Ando, T. (eds) Science and Technology of Mesoscopic Structures. Springer, Tokyo. https://doi.org/10.1007/978-4-431-66922-7_3
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DOI: https://doi.org/10.1007/978-4-431-66922-7_3
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