Spin-glass behavior of nanocrystalline multiferroic bismuth ferrite lead titanate

被引：14

作者：

Tuboltsev, Vladimir ^{[1
]}

Savin, Alexander ^{[2
]}

Sakamoto, Wataru ^{[3
]}

Hieno, Atsushi ^{[3
]}

Yogo, Toshinobu ^{[3
]}

Raisanen, Jyrki ^{[1
]}

机构：

[1] Univ Helsinki, Div Mat Phys, Dept Phys, FI-00014 Helsinki, Finland

[2] Aalto Univ, Low Temp Lab, FI-00076 Alto, Finland

[3] Nagoya Univ, Div Nanomat Sci, EcoTopia Sci Inst, Chikusa Ku, Nagoya, Aichi 4648603, Japan

来源：

JOURNAL OF MATERIALS CHEMISTRY | 2011年 / 21卷 / 03期

基金：

芬兰科学院;

关键词：

BIFEO3; THIN-FILMS; MAGNETIC-PROPERTIES; TUNNEL-JUNCTIONS; EXCHANGE BIAS; CRYSTAL; FERROELECTRICITY; POLARIZATION; PHYSICS; CO;

D O I：

10.1039/c0jm02273j

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Multiferroic bismuth ferrite lead titanate exhibiting both ferroelectricity and ferromagnetism in a single perovskite phase has been chemically synthesized in the form of nanocrystalline films with large surface/interface to volume atomic ratio. The films show both electric polarization and magnetization hysteresis loops and demonstrate behavior consistent with the existence of a spin-glass state at temperatures well above the room temperature. Anomalous magnetic properties and glassy dynamics are associated with a high degree of magnetic frustration and disorder due to the spatial confinement in nanosized crystalline grains, random distribution of anisotropy axes in the grains, inter-grain interaction and the effects of uncompensated spins on the large effective surface and interface favored by the nanocrystalline morphology of the films.

引用

页码：781 / 788

页数：8

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