The role of interfaces in CoFe/IrMn exchange biased systems

G. Vallejo-Fernandez; Melvin Vopson; L. Fernandez-Outon; K. O'Grady

doi:10.1109/TMAG.2006.879755

The role of interfaces in CoFe/IrMn exchange biased systems

G. Vallejo-Fernandez, Melvin Vopson, L. Fernandez-Outon, K. O'Grady

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

Abstract

A trilayer system consisting of an IrMn layer exchanged coupled to two CoFe layers of equal thickness has been studied. A single stage reversal was observed over a wide range of temperatures. Two bilayers with the same thicknesses of the pinning layer but different ferromagnetic thicknesses were also studied. By comparing the magnetic properties of these three stacks the effect of the interfacial area on the exchange field and the coercivity has been determined. We find that the interfacial area has a very minor effect on the exchange field Hex and the blocking temperature (TB) but causes a doubling of the coercivity (Hc). This indicates that Hc is dominated by the interface whereas the exchange bias is controlled by volumetric effects

Original language	English
Pages (from-to)	3008-3010
Number of pages	3
Journal	IEEE Transactions on Magnetics
Volume	42
Issue number	10
DOIs	https://doi.org/10.1109/TMAG.2006.879755
Publication status	Published - 2006

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title = "The role of interfaces in CoFe/IrMn exchange biased systems",

abstract = "A trilayer system consisting of an IrMn layer exchanged coupled to two CoFe layers of equal thickness has been studied. A single stage reversal was observed over a wide range of temperatures. Two bilayers with the same thicknesses of the pinning layer but different ferromagnetic thicknesses were also studied. By comparing the magnetic properties of these three stacks the effect of the interfacial area on the exchange field and the coercivity has been determined. We find that the interfacial area has a very minor effect on the exchange field Hex and the blocking temperature (TB) but causes a doubling of the coercivity (Hc). This indicates that Hc is dominated by the interface whereas the exchange bias is controlled by volumetric effects",

author = "G. Vallejo-Fernandez and Melvin Vopson and L. Fernandez-Outon and K. O'Grady",

year = "2006",

doi = "10.1109/TMAG.2006.879755",

language = "English",

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journal = "IEEE Transactions on Magnetics",

issn = "0018-9464",

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TY - JOUR

T1 - The role of interfaces in CoFe/IrMn exchange biased systems

AU - Vallejo-Fernandez, G.

AU - Vopson, Melvin

AU - Fernandez-Outon, L.

AU - O'Grady, K.

PY - 2006

Y1 - 2006

N2 - A trilayer system consisting of an IrMn layer exchanged coupled to two CoFe layers of equal thickness has been studied. A single stage reversal was observed over a wide range of temperatures. Two bilayers with the same thicknesses of the pinning layer but different ferromagnetic thicknesses were also studied. By comparing the magnetic properties of these three stacks the effect of the interfacial area on the exchange field and the coercivity has been determined. We find that the interfacial area has a very minor effect on the exchange field Hex and the blocking temperature (TB) but causes a doubling of the coercivity (Hc). This indicates that Hc is dominated by the interface whereas the exchange bias is controlled by volumetric effects

AB - A trilayer system consisting of an IrMn layer exchanged coupled to two CoFe layers of equal thickness has been studied. A single stage reversal was observed over a wide range of temperatures. Two bilayers with the same thicknesses of the pinning layer but different ferromagnetic thicknesses were also studied. By comparing the magnetic properties of these three stacks the effect of the interfacial area on the exchange field and the coercivity has been determined. We find that the interfacial area has a very minor effect on the exchange field Hex and the blocking temperature (TB) but causes a doubling of the coercivity (Hc). This indicates that Hc is dominated by the interface whereas the exchange bias is controlled by volumetric effects

U2 - 10.1109/TMAG.2006.879755

DO - 10.1109/TMAG.2006.879755

M3 - Article

SN - 0018-9464

VL - 42

SP - 3008

EP - 3010

JO - IEEE Transactions on Magnetics

JF - IEEE Transactions on Magnetics

IS - 10

ER -

The role of interfaces in CoFe/IrMn exchange biased systems

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