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http://dx.doi.org/10.4283/JKMS.2013.23.3.098

Post Annealing Treatment Introducing an Isotropy Magnetorsistive Property of Giant Magnetoresistance-Spin Valve Film for Bio-sensor  

Khajidmaa, P. (Department of Oriental Biomedical Engineering, Sangji University)
Park, Kwang-Jun (Department of Oriental Biomedical Engineering, Sangji University)
Lee, Sang-Suk (Department of Oriental Biomedical Engineering, Sangji University)
Publication Information
Journal of the Korean Magnetics Society / v.23, no.3, 2013 , pp. 98-103 More about this Journal
Abstract
The magnetic easy axis of the ferromagnetic layer for the dual-type GMR-SV (giant magnetoresistance-spin valve) having NiFe/Cu/NiFe/IrMn/NiFe/Cu/NiFe multuilayer structure controlled by the post annealing treatment. The magnetoresistive curves of a dual-type IrMn based GMR-SV depending on the direction of the magnetic easy axis of the free and the pinned layers are measured by the different angles for the applied fields. By investigating the switching process of magnetization for an arbitrary measuring direction, the optimum annealing temperature having a steady and isotropy magnetic sensitivity of 2.0 %/Oe was $105^{\circ}C$. This result suggests that the in-plane orthogonal magnetization for the dual-type GMR-SV film can be used by a high sensitive biosensor.
Keywords
dual-type giant magnetoresistance-spin valve (GMR-SV) film; magnetic easy axis; magnetoresistance curve; post annealing treatment; isotropy magnetic property; magnetic sensitivity;
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