Iso-structural phase transition in YMnO3 nanosized particles

被引：10

作者：

Tripathi, Saurabh ^{[1
]}

Petkov, Valeri ^{[1
]}

机构：

[1] Cent Michigan Univ, Dept Phys, Mt Pleasant, MI 48859 USA

来源：

APPLIED PHYSICS LETTERS | 2013年 / 102卷 / 06期

关键词：

FERROELECTRICITY; MULTIFERROICS; CANDIDATE; FILM;

D O I：

10.1063/1.4791596

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Structure studies on multiferroic YMnO3 particles with size varying between 467 +/- 42 nm (bulk) and 28 +/- 3 nm was carried out using high-energy synchrotron x-ray diffraction. Analysis of the diffraction data reveals that when the particles size decreases to about 121 nm an iso-structural phase transition takes place. The transition is accompanied by a substantial change in the unit cell volume and the ratio (c/a) of the parameters of the hexagonal lattice of YMnO3. The phase transition is similar to the one reported in bulk YMnO3 heated to temperatures of about 920 K. In this letter, we argue that the phase transition in nanosized YMnO3 is of an order-disorder type. (C) 2013 American Institute of Physics. [http://dx.doi.org/10.1063/1.4791596]

引用

页数：4

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