Anharmonic structural behavior in CuGeO3

被引：17

作者：

Braden, M

Ressouche, E

Buchner, B

Kessler, R

Heger, G

Dhalenne, G

Revcolevschi, A

机构：

[1] Forschungszentrum Karlsruhe, INFP, D-76021 Karlsruhe, Germany

[2] Ctr Etud Saclay, Lab Leon Brillouin, F-91191 Gif Sur Yvette, France

[3] CEA, Dept Rech Fondamentale Mat Condensee, F-38054 Grenoble 9, France

[4] Univ Cologne, Inst Phys 2, D-50937 Cologne, Germany

[5] Rhein Westfal TH Aachen, Inst Kristallog, D-52056 Aachen, Germany

[6] Univ Paris Sud, Lab Chim Solides Orsay, F-91405 Orsay, France

来源：

PHYSICAL REVIEW B | 1998年 / 57卷 / 18期

关键词：

D O I：

10.1103/PhysRevB.57.11497

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The structure of the spin-Peierls system CuGeO3 has been analyzed by neutron diffraction as a function of temperature up to 490 K. The pronounced temperature dependency of several bond angles reported previously is found to increase with increasing temperature. Therefore, it can be excluded that it is due to spin-lattice coupling. However, at low temperatures additional, much weaker, structural effects occur, which are clearly induced by a magnetic interaction. The strong distortion recently proposed for CuGeO3 by Hidaka et al. [M. Hidaka et al., J. Phys. Condens. Matter 9, 809 (1997)] is not found in our crystals neither on a short nor on a long-range scale.

引用

页码：11497 / 11503

页数：7

共 22 条

[1]

BEHRUZI M, UNPUB

[2]

Boucher JP, 1996, J PHYS I, V6, P1939, DOI 10.1051/jp1:1996198

[3] Structural analysis of CuGeO3: Relation between nuclear structure and magnetic interaction [J].

Braden, M ;

Wilkendorf, G ;

Lorenzana, J ;

Ain, M ;

McIntyre, GJ ;

Behruzi, M ;

Heger, G ;

Dhalenne, G ;

Revcolevschi, A .

PHYSICAL REVIEW B, 1996, 54 (02) :1105-1116

[4]

BRADEN M, IN PRESS PHYS REV LE

[5] Magnetic frustration induced formation of the spin-Peierls phase in CuGeO3: Experimental evidence [J].

Buchner, B ;

Ammerahl, U ;

Lorenz, T ;

Brenig, W ;

Dhalenne, G ;

Revcolevschi, A .

PHYSICAL REVIEW LETTERS, 1996, 77 (08) :1624-1627

[6] LATTICE FLUCTUATIONS WELL ABOVE THE SPIN-PEIERLS TRANSITION IN THE LINEAR-CHAIN SYSTEM CUGEO3 [J].

CHEN, CH ;

CHEONG, SW .

PHYSICAL REVIEW B, 1995, 51 (10) :6777-6779

[7] Floating zone crystal growth of pure and Si- or Zn-substituted copper germanate CuGeO3 [J].

Dhalenne, G ;

Revcolevschi, A ;

Rouchaud, JC ;

Fedoroff, M .

MATERIALS RESEARCH BULLETIN, 1997, 32 (07) :939-946

[8] Influence of side groups on 90 degrees superexchange: A modification of the Goodenough-Kanamori-Anderson rules [J].

Geertsma, W ;

Khomskii, D .

PHYSICAL REVIEW B, 1996, 54 (05) :3011-3014

[9]

Goodenough J. B., 1963, MAGNETISM CHEM BOND

[10] MAGNETIC PHASE-DIAGRAM OF THE SPIN-PEIERLS CUPRATE CUGEO3 [J].

HASE, M ;

TERASAKI, I ;

UCHINOKURA, K ;

TOKUNAGA, M ;

MIURA, N ;

OBARA, H .

PHYSICAL REVIEW B, 1993, 48 (13) :9616-9619

← 1 2 3 →