Voltage control of the magnetic coercive field: Multiferroic coupling or artifact?

M. Vopsaroiu; M. G. Cain; P. D. Woolliams; P. M. Weaver; M. Stewart; C. D. Wright; Y. Tran

doi:10.1063/1.3558982

Voltage control of the magnetic coercive field: Multiferroic coupling or artifact?

M. Vopsaroiu, M. G. Cain, P. D. Woolliams, P. M. Weaver, M. Stewart, C. D. Wright, Y. Tran

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

Abstract

The ability to dynamically tune the coercive field of magnetic thin films is a powerful tool for applications, including in magnetic recording disk technologies. Recently, a number of papers have reported the electrical voltage control of the coercive field of various magnetic thin films in multiferroic composites. Theoretically, this is possible in magneto-electric (ME) multiferroics due to the piezoferroelectric component that can be electrically activated to dynamically modify the properties of the magnetic component of the composite via a direct or strain mediated ME coupling. In this paper we fabricated and examined such structures and we determined that the magnetic coercive field reduction is most likely due to a heating effect. We concluded that this effect is probably an artifact that cannot be attributed to a multiferroic coupling.

Original language	English
Article number	066101
Journal	Journal of Applied Physics
Volume	109
Issue number	6
DOIs	https://doi.org/10.1063/1.3558982
Publication status	Published - 15 Mar 2011
Externally published	Yes

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title = "Voltage control of the magnetic coercive field: Multiferroic coupling or artifact?",

abstract = "The ability to dynamically tune the coercive field of magnetic thin films is a powerful tool for applications, including in magnetic recording disk technologies. Recently, a number of papers have reported the electrical voltage control of the coercive field of various magnetic thin films in multiferroic composites. Theoretically, this is possible in magneto-electric (ME) multiferroics due to the piezoferroelectric component that can be electrically activated to dynamically modify the properties of the magnetic component of the composite via a direct or strain mediated ME coupling. In this paper we fabricated and examined such structures and we determined that the magnetic coercive field reduction is most likely due to a heating effect. We concluded that this effect is probably an artifact that cannot be attributed to a multiferroic coupling.",

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AU - Vopsaroiu, M.

AU - Cain, M. G.

AU - Woolliams, P. D.

AU - Weaver, P. M.

AU - Stewart, M.

AU - Wright, C. D.

AU - Tran, Y.

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AB - The ability to dynamically tune the coercive field of magnetic thin films is a powerful tool for applications, including in magnetic recording disk technologies. Recently, a number of papers have reported the electrical voltage control of the coercive field of various magnetic thin films in multiferroic composites. Theoretically, this is possible in magneto-electric (ME) multiferroics due to the piezoferroelectric component that can be electrically activated to dynamically modify the properties of the magnetic component of the composite via a direct or strain mediated ME coupling. In this paper we fabricated and examined such structures and we determined that the magnetic coercive field reduction is most likely due to a heating effect. We concluded that this effect is probably an artifact that cannot be attributed to a multiferroic coupling.

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Voltage control of the magnetic coercive field: Multiferroic coupling or artifact?

Abstract

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