Strong room temperature exchange bias in self-assembled BiFeO3–Fe3O4 nanocomposite heteroepitaxial films

Self-assembled, nanocomposite heteroepitaxial films of BiFeO3 + Fe3O4 (x BiFeO3 + (1 − x) Fe3O4), where x = 0.5 or 0.9, were grown on (011) SrTiO3. Depending on the value of x and on the film thickness, either exchange bias or exchange enhancement of coercivity was demonstrated. In epitaxially and h...

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Veröffentlicht in:	Applied physics letters 2013-01, Vol.102 (1)
Hauptverfasser:	Choi, Eun-Mi, Weal, Emily, Bi, Zhenxing, Wang, Haiyan, Kursumovic, Ahmed, Fix, Thomas, Blamire, Mark G., MacManus-Driscoll, Judith L.
Format:	Artikel
Sprache:	eng
Schlagworte:	Bias Coercive force Compatibility Epitaxy Film thickness Nanocomposites Nanomaterials Nanostructure
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container_title	Applied physics letters
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creator	Choi, Eun-Mi Weal, Emily Bi, Zhenxing Wang, Haiyan Kursumovic, Ahmed Fix, Thomas Blamire, Mark G. MacManus-Driscoll, Judith L.
description	Self-assembled, nanocomposite heteroepitaxial films of BiFeO3 + Fe3O4 (x BiFeO3 + (1 − x) Fe3O4), where x = 0.5 or 0.9, were grown on (011) SrTiO3. Depending on the value of x and on the film thickness, either exchange bias or exchange enhancement of coercivity was demonstrated. In epitaxially and highly strained (7%) films of 250 nm thickness, and for x = 0.9, exchange bias (HEB) values of 40 Oe and HEB/HC ratios of 0.5 were achieved. Most crucially, these effects were measured at room temperature, showing the high potential of chemically compatible BiFeO3 + Fe3O4 for achieving room temperature magnetoelectricity.
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subjects	Bias Coercive force Compatibility Epitaxy Film thickness Nanocomposites Nanomaterials Nanostructure
title	Strong room temperature exchange bias in self-assembled BiFeO3–Fe3O4 nanocomposite heteroepitaxial films
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