Reversal mechanism and suppression of training in an exchange-coupled system

Amitesh Paul; Claus M. Schneider; Jochen Stahn

doi:10.1103/PhysRevB.76.184424

Reversal mechanism and suppression of training in an exchange-coupled system

Amitesh Paul^*, Claus M. Schneider, Jochen Stahn

^*Corresponding author for this work

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

27 Scopus citations

Abstract

We show that the extent of training in exchange-biased systems can be strongly influenced by the field cooling procedure. This phenomenon is revealed by comparing the behavior of the system in two different magnetic configurations: cooling the system in a remanent state without an external magnetic field (state I) results in a suppression of the training effect, whereas the same sample being field cooled (state II) exhibits a clear training response. Interestingly, by cooling the sample in a critical field HFC close to the coercive field HC of the ferromagnet, we find a peculiar situation with a coexistence of states I and II. By using a depth-sensitive polarized neutron reflectivity technique, we can establish a clear correlation of the reversal mechanism with either the untrained or trained state.

Original language	English
Article number	184424
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	76
Issue number	18
DOIs	https://doi.org/10.1103/PhysRevB.76.184424
State	Published - 20 Nov 2007
Externally published	Yes

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10.1103/PhysRevB.76.184424

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title = "Reversal mechanism and suppression of training in an exchange-coupled system",

abstract = "We show that the extent of training in exchange-biased systems can be strongly influenced by the field cooling procedure. This phenomenon is revealed by comparing the behavior of the system in two different magnetic configurations: cooling the system in a remanent state without an external magnetic field (state I) results in a suppression of the training effect, whereas the same sample being field cooled (state II) exhibits a clear training response. Interestingly, by cooling the sample in a critical field HFC close to the coercive field HC of the ferromagnet, we find a peculiar situation with a coexistence of states I and II. By using a depth-sensitive polarized neutron reflectivity technique, we can establish a clear correlation of the reversal mechanism with either the untrained or trained state.",

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AU - Paul, Amitesh

AU - Schneider, Claus M.

AU - Stahn, Jochen

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N2 - We show that the extent of training in exchange-biased systems can be strongly influenced by the field cooling procedure. This phenomenon is revealed by comparing the behavior of the system in two different magnetic configurations: cooling the system in a remanent state without an external magnetic field (state I) results in a suppression of the training effect, whereas the same sample being field cooled (state II) exhibits a clear training response. Interestingly, by cooling the sample in a critical field HFC close to the coercive field HC of the ferromagnet, we find a peculiar situation with a coexistence of states I and II. By using a depth-sensitive polarized neutron reflectivity technique, we can establish a clear correlation of the reversal mechanism with either the untrained or trained state.

AB - We show that the extent of training in exchange-biased systems can be strongly influenced by the field cooling procedure. This phenomenon is revealed by comparing the behavior of the system in two different magnetic configurations: cooling the system in a remanent state without an external magnetic field (state I) results in a suppression of the training effect, whereas the same sample being field cooled (state II) exhibits a clear training response. Interestingly, by cooling the sample in a critical field HFC close to the coercive field HC of the ferromagnet, we find a peculiar situation with a coexistence of states I and II. By using a depth-sensitive polarized neutron reflectivity technique, we can establish a clear correlation of the reversal mechanism with either the untrained or trained state.

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Reversal mechanism and suppression of training in an exchange-coupled system

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