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Magnetic and Ferroelectric Properties of YMnO3 Epitaxial Thin Films

Published online by Cambridge University Press:  26 February 2011

Kazuhiro Maeda
Affiliation:
[email protected], Osaka Prefecture University, Physics and Electronics, 1-1 Gakuen-cho, Naka-Ku, sakai, N/A, Japan
Takeshi Yshimura
Affiliation:
[email protected], Osaka Prefecture University, Sakai, N/A, Japan
Norifumi Fujimura
Affiliation:
[email protected], Osaka Prefecture University, Sakai, N/A, Japan
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Abstract

YMnO3, which is one of hexagonal RMnO3 compounds, has antiferromagnetic and ferroelectric properties, simultaneously. Recently, it has been reported that cross-correlation in the magnetic dielectric properties on hexagonal YMnO3 single crystals. However, the cross-correlation in the magnetic-ferroelectric properties has not been understood yet. In this study, we investigated the cross correlation between magnetism and ferroelectricity on YMnO3 epitaxial films with excellent crystallinity. YMnO3 epitaxial films were deposited pulsed laser deposition. The YMnO3 epitaxial films show the dielectric anomalies at around Néel point of the films. It was suggested that the ferroelectric domain switching was suppressed by the magnetic ordering. The relationship between the magnetic structure and the ferroelectric properties are discussed in terms of the temperature dependences of magnetization and dielectric permittivity. Moreover, the ablation plume of YMnO3 was investigated by optical emission spectroscopy. The effect of the ablation conditions on the thin film growth and electrical properties was discussed.

Type
Research Article
Copyright
Copyright © Materials Research Society 2007

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References

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