Weak magnetic moment on IrMn exchange bias pinning layers

We present evidence from soft x-ray resonant magnetic scattering measurements at the Mn L3 edge for the existence of a small magnetic moment on the antiferromagnetic IrMn pinning layer in a NiFe/Cu/Co/IrMn spin valve structure. The variation of the signal in an applied magnetic field shows that the...

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Bibliographic Details
Published in:Applied physics letters 2001-08, Vol.79 (7), p.985-987
Main Authors: Hase, T. P. A., Fulthorpe, B. D., Wilkins, S. B., Tanner, B. K., Marrows, C. H., Hickey, B. J.
Format: Article
Language:English
Subjects:
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
DOMAIN STRUCTURE
MAGNETIC FIELDS
MAGNETIC MOMENTS
PHYSICS
SCATTERING
SPIN
VALVES
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Summary:We present evidence from soft x-ray resonant magnetic scattering measurements at the Mn L3 edge for the existence of a small magnetic moment on the antiferromagnetic IrMn pinning layer in a NiFe/Cu/Co/IrMn spin valve structure. The variation of the signal in an applied magnetic field shows that the moment lies antiparallel to the Co moment. Changes in the Mn L3 edge signal as the Co moment is rotated into the hard direction are rapid and do not appear to be associated with thermal reordering of the antiferromagnetic domain structure.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.1392304