NEUTRON-SCATTERING STUDY OF 2-DIMENSIONAL RANDOMLY MIXED MAGNETS WITH COMPETING ANISOTROPIES K2CU1-XCOXF4

被引：7

作者：

KADOWAKI, H ^{[1
]}

YOSHIZAWA, H ^{[1
]}

ITOH, M ^{[1
]}

YAMADA, I ^{[1
]}

机构：

[1] CHIBA UNIV, FAC SCI, DEPT PHYS, CHIBA 260, JAPAN

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 1990年 / 59卷 / 02期

关键词：

competing anisotropics; mixed magnet; neutron scattering; two-dimensional magnet;

D O I：

10.1143/JPSJ.59.713

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The random mixture of a quasi-two-dimensional magnet of K2Cu1-xCoxF4 is studied by neutron scattering in the ferromagnetic composition range, 0.2>x>0. K2CuF4 is the XY-like ferromagnet with the distorted K2NiF4-type structure. The substitution of Ising spins of Co for XY-like spins of Cu by a few percent brings about a rotation of the easy axis. Two critical lines of three-dimensional XY and two-dimensional Ising characters, intersecting at a tetracritical point, are observed as is commonly seen in randomly mixed magnets with orthogonal anisotropics. It was also found that K2Cu1-xCoxF4 with 0.2>x>0.05 is a model system of the two-dimensional Ising ferromagnet. © 1990, THE PHYSICAL SOCIETY OF JAPAN. All rights reserved.

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页码：713 / 717

页数：5

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