Interfacial spin cluster effects in exchange bias systems

Robert Carpenter; Gonzalo Vallejo Fernandez; Kevin Dermot O'Grady

doi:10.1063/1.4865219

Interfacial spin cluster effects in exchange bias systems

Robert Carpenter, Gonzalo Vallejo Fernandez, Kevin Dermot O'Grady

Physics

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

Abstract

In this work the effect of exchange bias on the hysteresis loop of CoFe is observed. The evolution of the coercivities and the shift of the hysteresis loop during the annealing process has been measured for films deposited on NiCr and Cu seed layers. Through comparison of the as deposited and field anneal loops it is clear that for an exchange biased material the two coercivities are due to different reversal processes. This behaviour is attributed to spin clusters at the ferromagnet/antiferromagnet interface which behave in a similar manner to a fine particle system.

Original language	English
Article number	17D715
Journal	Journal of Applied Physics
Volume	115
Issue number	17
Early online date	12 Feb 2014
DOIs	https://doi.org/10.1063/1.4865219
Publication status	Published - 7 May 2014

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10.1063/1.4865219

Cite this

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title = "Interfacial spin cluster effects in exchange bias systems",

abstract = "In this work the effect of exchange bias on the hysteresis loop of CoFe is observed. The evolution of the coercivities and the shift of the hysteresis loop during the annealing process has been measured for films deposited on NiCr and Cu seed layers. Through comparison of the as deposited and field anneal loops it is clear that for an exchange biased material the two coercivities are due to different reversal processes. This behaviour is attributed to spin clusters at the ferromagnet/antiferromagnet interface which behave in a similar manner to a fine particle system. ",

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AB - In this work the effect of exchange bias on the hysteresis loop of CoFe is observed. The evolution of the coercivities and the shift of the hysteresis loop during the annealing process has been measured for films deposited on NiCr and Cu seed layers. Through comparison of the as deposited and field anneal loops it is clear that for an exchange biased material the two coercivities are due to different reversal processes. This behaviour is attributed to spin clusters at the ferromagnet/antiferromagnet interface which behave in a similar manner to a fine particle system.

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DO - 10.1063/1.4865219

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JO - Journal of Applied Physics

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