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American Physical Society, Physical Review Letters, 10(117)

DOI: 10.1103/physrevlett.117.107403

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Optical Writing of Magnetic Properties by Remanent Photostriction

Journal article published in 2016 by V. Iurchuk, D. Schick, J. Bran, D. Colson, A. Forget, D. Halley, A. Koc, M. Reinhardt, C. Kwamen, N. A. Morley, M. Bargheer, M. Viret ORCID, R. Gumeniuk ORCID, G. Schmerber, B. Doudin and other authors.
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This paper is available in a repository.

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Abstract

We present an optically induced remanent photostriction in BiFeO3, resulting from the photovoltaic effect, which is used to modify the ferromagnetism of Ni film in a hybrid BiFeO3 Ni structure. The 75 change in coercivity in the Ni film is achieved via optical and nonvolatile control. This photoferromagnetic effect can be reversed by static or ac electric depolarization of BiFeO3. Hence, the strain dependent changes in magnetic properties are written optically, and erased electrically. Light mediated straintronics is therefore a possible approach for low power multistate control of magnetic elements relevant for memory and spintronic applications