Low temperature properties of spin valves with extremely thin IrMn

The properties of IrMn spin valves with tIrMn⩽26 Å are explored at temperatures down to 5 K. The structure is: Ti(50 Å)/NiFe(40 Å)/Co(8 Å)/Cu(30 Å)/Co(30 Å)/IrMn(t Å)/Ti(50 Å) on a Si substrate. The low temperature giant magnetoresistance(GMR) is not greatly affected by the thickness of the IrMn. Th...

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Bibliographic Details
Published in:Journal of applied physics 2002-05, Vol.91 (10), p.8569-8571
Main Authors: Eckert, J. C., Stern, N. P., Barton, A. E., Mann, D. A., Sparks, P. D., Carey, M. J.
Format: Article
Language:English
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Summary:The properties of IrMn spin valves with tIrMn⩽26 Å are explored at temperatures down to 5 K. The structure is: Ti(50 Å)/NiFe(40 Å)/Co(8 Å)/Cu(30 Å)/Co(30 Å)/IrMn(t Å)/Ti(50 Å) on a Si substrate. The low temperature giant magnetoresistance(GMR) is not greatly affected by the thickness of the IrMn. The thinner the IrMn, the lower the temperature at which the GMR is adversely affected. This is consistent with a reduction in blocking temperature. A number of interesting features in the coercivity and field training are IrMn thickness dependent.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.1451888