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Title: | Strain-induced stabilization of new magnetic spinel structures in epitaxial oxide heterostructures. |
Author: | Rigato, Franco Estradé Albiol, Sònia Arbiol i Cobos, Jordi Peiró Martínez, Francisca Lüders, Ulrike Anne Martí, X. Sánchez Barrera, Florencio Fontcuberta i Griñó, Josep |
Keywords: | Pel·lícules fines Òxids Propietats magnètiques Thin films Oxides Magnetic properties |
Issue Date: | 2007 |
Publisher: | Elsevier B.V. |
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. |
Note: | Versió postprint del document publicat a: http://dx.doi.org/10.1016/j.mseb.2007.07.102 |
It is part of: | Materials Science and Engineering B-Solid State Materials for Advanced Technology, 2007, vol. 144, num. 1-3, p. 43-48 |
URI: | http://hdl.handle.net/2445/29362 |
Related resource: | http://dx.doi.org/10.1016/j.mseb.2007.07.102 |
ISSN: | 0921-5107 |
Appears in Collections: | Articles publicats en revistes (Enginyeria Electrònica i Biomèdica) |
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