PHASE-TRANSITIONS AND SPIN DYNAMICS IN HEXAGONAL ABX3 TYPE ANTIFERROMAGNETS

被引：11

作者：

TANAKA, H

机构：

[1] Department of Physics, College of General Education, Nagoya University, Chikusa-ku, Nagoya, 464-01, Furo-cho

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 1990年 / 90-1卷

关键词：

D O I：

10.1016/S0304-8853(10)80088-5

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have measured ESR spectra of CsNiBr3, RbNiBr3 and CsMnI3 in order to investigate the spin dynamics related to the successive phase transitions. The resonance field of the omega-1-mode, whose resonance condition at T = 0 K is given by omega/gamma = H for H perpendicular-to c, shifts toward the high-field side with increasing temperature and shows a tendency to diverge at the lower transition point T(N2). This fact seems to indicate that the local rotational fluctuations of the triangular spin structure around the c-axis are enhanced as temperature is increased and at T(N2) the distribution of the directions of the local triangular structure becomes isotropic with respect to the c-axis.

引用

页码：251 / 254

页数：4

共 17 条

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