Improving exchange-coupling field in the same thickness of pinned magnetic layer

A conventional Ta/NiFe/Cu/NiFe/FeMn spin valve was prepared to investigate the exchange bias properties with the variations of deposition field. By enhancing the deposition magnetic fields from 50 to 650 Oe, increase of exchange bias fields at a given thickness of the pinned NiFe layer has been foun...

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Bibliographic Details
Published in:Journal of magnetism and magnetic materials 2009-09, Vol.321 (18), p.2855-2858
Main Authors: Tang, X.L., Wu Zhang, H., Su, H., Jing, Y.L., Zhong, Z. Yong
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Deposition
Exact sciences and technology
Exchange
Exchange bias
Giant magnetoresistance
Intermetallics
Iron compounds
Magnetic fields
Magnetic properties and materials
Magnetotransport phenomena, materials for magnetotransport
Nickel base alloys
Nickel compounds
Physics
Spin valve
Spin valves
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Description
Summary:A conventional Ta/NiFe/Cu/NiFe/FeMn spin valve was prepared to investigate the exchange bias properties with the variations of deposition field. By enhancing the deposition magnetic fields from 50 to 650 Oe, increase of exchange bias fields at a given thickness of the pinned NiFe layer has been found in the spin valves. In this paper, we show that this increase is due to the change of magnetic moment distribution at the ferromagnetic and antiferromagnetic interface by comparison of measured results with the interfacial uncompensated model. Therefore, by enhancing deposition magnetic fields, a large exchange-coupling field can be achieved in relatively thicker magnetic films for application.
ISSN:0304-8853
DOI:10.1016/j.jmmm.2009.04.050