Transverse magnetoresistance in AgMn in the spin glass regime
作者:
A. K. Nigam,
R. K. Ray,
T. M. Srinivasan,
A. K. Majumdar,
期刊:
Journal of Applied Physics
(AIP Available online 1979)
卷期:
Volume 50,
issue B11
页码: 7361-7363
ISSN:0021-8979
年代: 1979
DOI:10.1063/1.326934
出版商: AIP
数据来源: AIP
摘要:
Transverse magnetoresistance (TMR) have been measured in two AgMn (1.1 and 5.4 at.%) as well as in one AuFe (6.6 at.%) alloys between 1.5 and 77 K. There is a low‐field positive TMR below the spin‐freezing temperature Todecreasing sharply with temperature. The negative TMR at higher fields is almost temperature‐independent below To. Above To, the magnitude of the negative one increases with field and gradually decreases with temperature. Freshly annealed samples show a definite reduction of the magnitude of the negative TMR for the concentrated alloys. There is no change in the case of the dilute AgMn. The above common features will be qualitatively explained in terms of thermal and magnetic unlocking of spins, magnetic ordering and the spin‐flip scattering.
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