The magnetization of epitaxial nanometric CoFe2O4 (001) layers

被引：0
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作者：
Rigato, F. [1 ]
Geshev, J. [2 ]
Skumryev, V. [3 ]
Fontcuberta, J. [1 ]
机构：
[1] Institut de Cìncia de Materials de Barcelona (ICMAB-CSIC), Campus UAB s/n, 08193 Bellaterra, Spain
[2] Instituto de Física, Universidade Federal Do Rio Grande Do sul (UFRGS), Porto Alegre, 91501-970 Rio Grande do Sul, Brazil
[3] Institut Catal de Recerca i Estudis Avanats (ICREA), Departament de Física, Universitat Autnoma de Barcelona, 08193 Bellaterra, Spain
来源：
Journal of Applied Physics | 2009年 / 106卷 / 11期
关键词：
We have studied the magnetic anisotropy of nanometric CoFe 2O4 (CFO) thin films grown on (100) SrTiO3 (STO) substrates. It has been found that epitaxial substrate-induced compressive strain makes the normal-to-film axis harder than the in-plane directions. In agreement with some previous reports; the magnetization loops are found to display a characteristic shrinking at low fields. Detailed structural and microstructural analyses; together with a modeling of the magnetization loops; revealed that the microstructure of the films; namely; the coexistence of a continuous CFO and a distribution of pyramidal CFO huts emerging from the surface; are responsible for this peculiar feature. We argue that this behavior; which significantly impacts the magnetic properties; could be a general trend of spinel films grow on (001)STO substrates. © 2009 American Institute of Physics;
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