Thermal phenomena in IrMn exchange biased systems

L E Fernandez-Outon; K O'Grady; M J Carey

doi:10.1063/1.1667811

Thermal phenomena in IrMn exchange biased systems

L E Fernandez-Outon, K O'Grady, M J Carey

Physics

Research output: Contribution to journal › Article › peer-review

Abstract

In this paper, we report on a detailed study of reversal in the antiferromagnetic layer in IrMn-based exchange-biased systems. By a process of careful field cycling and heating with the antiferromagnet aligned in the opposite direction to the original set direction, we are able to study thermal activation over the energy barriers in the antiferromagnetic material. We find that the peak in the coercivity is observed, but in no way correlates to the blocking temperature. We conclude that the origin of the coercivity enhancement in exchange-biased systems lies in effects at the interface. (C) 2004 American Institute of Physics.

Original language	English
Pages (from-to)	6852-6854
Number of pages	3
Journal	Journal of Applied Physics
Volume	95
Issue number	11
DOIs	https://doi.org/10.1063/1.1667811
Publication status	Published - 1 Jun 2004

Keywords

SPIN-VALVES
REVERSAL

Access to Document

10.1063/1.1667811

Cite this

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abstract = "In this paper, we report on a detailed study of reversal in the antiferromagnetic layer in IrMn-based exchange-biased systems. By a process of careful field cycling and heating with the antiferromagnet aligned in the opposite direction to the original set direction, we are able to study thermal activation over the energy barriers in the antiferromagnetic material. We find that the peak in the coercivity is observed, but in no way correlates to the blocking temperature. We conclude that the origin of the coercivity enhancement in exchange-biased systems lies in effects at the interface. (C) 2004 American Institute of Physics.",

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N2 - In this paper, we report on a detailed study of reversal in the antiferromagnetic layer in IrMn-based exchange-biased systems. By a process of careful field cycling and heating with the antiferromagnet aligned in the opposite direction to the original set direction, we are able to study thermal activation over the energy barriers in the antiferromagnetic material. We find that the peak in the coercivity is observed, but in no way correlates to the blocking temperature. We conclude that the origin of the coercivity enhancement in exchange-biased systems lies in effects at the interface. (C) 2004 American Institute of Physics.

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DO - 10.1063/1.1667811

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