Issue 22, 2013

Significant room temperature ferromagnetism in PAA thin films

Abstract

Room-temperature ferromagnetism has been observed in Porous Anodic Aluminum (PAA) thin films, with an out-of-plane saturation magnetization of 60 emu cm−3. The significant out-of-plane saturation magnetization is associated with the porous structure of the film. As there were no magnetic impurities present, the origin of the ferromagnetism is most likely due to exchange interactions between localized electron spin moments resulting from oxygen vacancies in the films. A similar hysteretic behavior is observed in porous thin films of nonmagnetic TiO2 and ZnO. This suggests that ferromagnetism may be a universal characteristic of porous thin films of nonmagnetic metal oxides. Our present results suggest a promising direction for research in spintronic devices.

Graphical abstract: Significant room temperature ferromagnetism in PAA thin films

Article information

Article type
Paper
Submitted
12 Mar 2013
Accepted
04 Apr 2013
First published
04 Apr 2013

J. Mater. Chem. C, 2013,1, 3569-3572

Significant room temperature ferromagnetism in PAA thin films

H. Sun, H. Zhang, X. Hou, L. Liu, T. Wu and S. Yang, J. Mater. Chem. C, 2013, 1, 3569 DOI: 10.1039/C3TC30462K

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