OBSERVATION OF THE CONDENSATION OF MAGNONS IN THE QUASI-2-DIMENSIONAL PLANAR FERROMAGNET K2CUF4

被引：23

作者：

HIRAKAWA, K

YOSHIZAWA, H

机构：

[1] The Institute for Solid State Physics, The University of Tokyo, Minato-ku Tokyo, Roppongi

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 1979年 / 47卷 / 02期

关键词：

D O I：

10.1143/JPSJ.47.368

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Magnetic field dependence of the neutron Bragg scattering as well as the diffuse scattering intensities in K2CuF4 has been observed as a function of temperature. It is found that about 42% of the observed Bragg scattering intensity is due to a giant fluctuation of spins which can be erased by very weak internal field. This fluctuation part is thought to be a new phase with condensation of magnons. The rest 58% corresponds to the phase with conventional long range order. The critical points for these two phases are the same within the experimental errors. © 1979, THE PHYSICAL SOCIETY OF JAPAN. All rights reserved.

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页码：368 / 378

页数：11

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