MODEL FOR ELASTIC ANOMALIES IN K2PT(CN)4BR0.3.3H2O

被引：11

作者：

KURIHARA, S

FUKUYAMA, H

NAKAJIMA, S

机构：

[1] The Institute for Solid State Physics, The University of Tokyo, Tokyo 106, Roppongi, Minato-ku

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 1979年 / 47卷 / 05期

关键词：

D O I：

10.1143/JPSJ.47.1403

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A “spin-lattice” model is proposed for K2Pt(CN)4Br0.3·3H2O (KCP) to solve the puzzling problem of the apparent complete softening of shear modulus C66 without any structural phase transition at low temperatures. Our model emphasizes the importance of the site II water molecules lying between bromine ions and Pt(CN)4 complexes. Each water molecule is assumed to have three configurations, which are represented by an S=1 Ising spin. An almost complete agreement is obtained between calculation and experimental data. A marked “hardening” of C66 at low temperatures (T<90 K) is predicted. A structural phase transition is possible if the spin-lattice coupling can be enhanced by e.g. external pressure. Ultrasonic attenuation coefficient α66, and also C44, α44, are calculated. © 1979, THE PHYSICAL SOCIETY OF JAPAN. All rights reserved.

引用

收藏

页码：1403 / 1410

页数：8

相关论文

共 12 条

[1] LATTICE-DYNAMICS OF K2PT(CN)4BR0.3.3.2D2O (KCP) STUDIES BY INELASTIC NEUTRON-SCATTERING [J].

CARNEIRO, K ;

SHIRANE, G ;

WERNER, SA ;

KAISER, S .

PHYSICAL REVIEW B, 1976, 13 (10) :4258-4273

[2]

DOI H, 1977, SOLID STATE COMMUN, V24, P729, DOI 10.1016/0038-1098(77)90085-0

[3] WATER-CONTENT OF QUASI ONE-DIMENSIONAL CONDUCTOR K2PT(CN)4BR0.3 XH2O AS A FUNCTION OF EXTERNAL WATER-VAPOR PRESSURE [J].

DROSDZIOK, S ;

ENGBRODT, M .

SOLID STATE COMMUNICATIONS, 1975, 17 (11) :1339-1342

[4] SPECIFIC-HEAT OF K2PT(CN)4BR0.3.3H2O [J].

HATTA, I ;

MATSUDA, T ;

DOI, H ;

NAGASAWA, H ;

ISHIGURO, T ;

KAGOSHIMA, S .

SOLID STATE COMMUNICATIONS, 1978, 27 (04) :479-481

[5] COMBINED X-RAY AND NEUTRON-DIFFRACTION STUDY OF K2[PT(CN)4]X0.3.3H2O WITH X=BR, CL(KCP)BETWEEN 31 K AND ROOM-TEMPERATURE [J].

HEGER, G ;

DEISEROTH, HJ ;

SCHULZ, H .

ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE, 1978, 34 (MAR) :725-731

[6]

KOBAYASHI H, 1979, APR JOINT M AM CHEM

[7] CRYSTAL-STRUCTURE OF KCP(BR) [K2PT(CN)4BRO.30.3.2H2O] AS DETERMINED BY 300-K X-RAY AND 8-K NEUTRON-DIFFRACTION INVESTIGATIONS [J].

PETERS, C ;

EAGEN, CF .

INORGANIC CHEMISTRY, 1976, 15 (04) :782-788

[8] OBSERVATION OF GIANT KOHN ANOMALY IN ONE-DIMENSIONAL CONDUCTOR K2PT(CN)4BR0.3.3H2O [J].

RENKER, B ;

RIETSCHEL, H ;

PINTSCHOVIUS, L ;

GLASER, W ;

BRUESCH, P ;

KUSE, D ;

RICE, MJ .

PHYSICAL REVIEW LETTERS, 1973, 30 (22) :1144-1146

[9] NEUTRON-SCATTERING STUDY OF STRUCTURAL PHASE-TRANSITION IN ONE-DIMENSIONAL CONDUCTOR K2PT(CN)4BR0.3.3D2O [J].

RENKER, B ;

PINTSCHOVIUS, L ;

GLASER, W ;

RIETSCHEL, H ;

COMES, R ;

LIEBERT, L ;

DREXEL, W .

PHYSICAL REVIEW LETTERS, 1974, 32 (15) :836-839

[10] EFFECTS OF DEHYDRATION ON MAGNETIC-PROPERTIES OF K2PT(CN)4BR0.3.XH2O [J].

TAKAHASHI, T ;

AKAGAWA, H ;

DOI, H ;

NAGASAWA, H .

SOLID STATE COMMUNICATIONS, 1977, 23 (11) :809-814