Correlation between magnetoresistance and magnetization inAgMn andAuMn spin-glasses
- 1 September 1983
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 28 (5) , 2750-2754
- https://doi.org/10.1103/physrevb.28.2750
Abstract
Magnetization has been measured between 2 and 77 K and mostly up to fields of 20 kOe in AgMn (1.1 and 5.4 at.%) and AuMn (1.8 and 4.6 at.%) spin-glass samples where the transverse magnetoresistance was measured earlier. It is found, for the first time, that over a wide range of temperature and magnetic field the negative magnetoresistance varies as the square of the bulk magnetization resulting in an universal curve in the spin-glass regime. The constant of proportionality is independent of the Mn concentration. A theoretical justification is provided in terms of existing theories.Keywords
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