Critical phenomena in helical magnet β-MnO2:: X-ray magnetic scattering study

被引：7

作者：

Sato, H ^{[1
]}

Kawamura, Y

Ogawa, T

Murakami, Y

Ohsumi, H

Mizumaki, M

Ikeda, N

机构：

[1] Chuo Univ, Dept Phys, Bunkyo Ku, Tokyo 1128551, Japan

[2] Tohoku Univ, Dept Phys, Aoba Ku, Sendai, Miyagi 9808578, Japan

[3] Japan Synchrotron Radiat Res Inst, Mikazuki, Hyogo 6795198, Japan

来源：

PHYSICA B-CONDENSED MATTER | 2003年 / 329卷

关键词：

critical phenomena; manganese oxides; helical magnetism; X-ray magnetic scattering;

D O I：

10.1016/S0921-4526(02)02501-2

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

It has been theoretically expected that critical phenomena of helimagnetism is drastically different from those of collinear antiferromagnetism due to the existence of chiral degree of freedom. In order to verify this prediction, we carried out X-ray magnetic scattering measurements on a simplest helimagnet beta-MnO2 using a synchrotron radiation. The critical exponent beta was estimated at 0.25+/-0.05 from the temperature dependence of the scattering intensity. This value is consistent with the predicted value 0.253 for chiral system rather than with 0.346 for collinear system. (C) 2003 Elsevier Science B.V. All rights reserved.

引用

页码：757 / 758

页数：2

共 9 条

[1] *ETAT EXPERIMENTAL DE LA QUESTION DE LANTIFERROMAGNETISME [J].