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Article

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Accepted version

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2007

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Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/29362

Strain-induced stabilization of new magnetic spinel structures in epitaxial oxide heterostructures.

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http://dx.doi.org/10.1016/j.mseb.2007.07.102

Abstract

We report here on the growth of NiFe2O4 epitaxial thin films of different thickness (3 nm ¿ t ¿ 32 nm) on single crystalline substrates having spinel (MgAl2O4) or perovskite (SrTiO3) structure. Ultrathin films, grown on any of those substrates, display a huge enhancement of the saturation magnetization: we will show that partial cationic inversion may account for this enhancement, although we will argue that suppression of antiparallel collinear spin alignment due to size-effects cannot be excluded. Besides, for thicker films, the magnetization of films on MAO is found to be similar to that of bulk ferrite; in contrast, the magnetization of films on STO is substantially lower than bulk. We discuss on the possible mechanisms leading to this remarkable difference of magnetization.

Subject

Pel·lícules fines, Òxids, Propietats magnètiques

Subject (English)

Thin films, Oxides, Magnetic properties

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Articles publicats en revistes (Enginyeria Electrònica i Biomèdica)

Citation

RIGATO, Franco, et al. Strain-induced stabilization of new magnetic spinel structures in epitaxial oxide heterostructures. Materials Science and Engineering B-Solid State Materials for Advanced Technology. 2007. Vol. 144, num. 1-3, pags. 43-48. ISSN 0921-5107. [consulted: 12 of August of 2026]. Available at: https://hdl.handle.net/2445/29362

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