Crystal structure of CuGeO3 under pressure

被引：16

作者：

Brauninger, S ^{[1
]}

Schwarz, U ^{[1
]}

Hanfland, M ^{[1
]}

Zhou, T ^{[1
]}

Kremer, RK ^{[1
]}

Syassen, K ^{[1
]}

机构：

[1] EUROPEAN SYNCHROTRON RADIAT FACIL, F-38043 GRENOBLE, FRANCE

来源：

PHYSICAL REVIEW B | 1997年 / 56卷 / 18期

关键词：

D O I：

10.1103/PhysRevB.56.R11357

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have investigated the crystal structure of orthorhombic CuGeO3 under hydrostatic pressure (P<6.5 GPa, T=298 K) using high-resolution angle-dispersive x-ray powder diffraction. A nonlinear compression behavior is observed for all three crystallographic axes. Full profile refinements of the diffraction patterns provide the internal structural parameters in the stability range of the ambient pressure phase. The main structural changes induced by pressure consist of tilting of the CuO4 ribbons around the c axis and a large decrease of the Cul-Ol bond distance. Possible implications of these results for the explanation of the strong pressure dependence of the spin-Peierls transition temperature are discussed. [S0163-1829(97)52242-9].

引用

页码：11357 / 11360

页数：4

共 23 条

[1] A HIGH-PRESSURE X-RAY-POWDER DIFFRACTION AND INFRARED STUDY OF COPPER GERMANATE, A HIGH-TC MODEL [J].

ADAMS, DM ;

HAINES, J ;

LEONARD, S .

JOURNAL OF PHYSICS-CONDENSED MATTER, 1991, 3 (27) :5183-5190

[2]

AKSELRUD LG, 1992, COMPUTER PROGRAM CSD

[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] 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

[5] Pressure-temperature phase diagram of the spin-peierls compound CuGeO3 [J].

Goni, AR ;

Zhou, T ;

Schwarz, U ;

Kremer, RK ;

Syassen, K .

PHYSICAL REVIEW LETTERS, 1996, 77 (06) :1079-1082

[6] Pressure-induced intercalation and amorphization in the spin-Peierls compound CuGeO3 - Comment on [J].

Haines, J ;

Adams, DM .

PHYSICAL REVIEW LETTERS, 1996, 77 (01) :204-204

[7]

HAMMERSLEY A, COMPUTER PROGRAM FIT

[8] GRAPHITE UNDER PRESSURE - EQUATION OF STATE AND 1ST-ORDER RAMAN MODES [J].

HANFLAND, M ;

BEISTER, H ;

SYASSEN, K .

PHYSICAL REVIEW B, 1989, 39 (17) :12598-12603

[9] OBSERVATION OF THE SPIN-PEIERLS TRANSITION IN LINEAR CU2+ (SPIN-1/2) CHAINS IN AN INORGANIC COMPOUND CUGEO3 [J].

HASE, M ;

TERASAKI, I ;

UCHINOKURA, K .

PHYSICAL REVIEW LETTERS, 1993, 70 (23) :3651-3654

[10] HIGH-PRESSURE SYNTHESIS OF CU2GEO4 WITH HAUSMANNITE STRUCTURE [J].

HEGENBART, W ;

RAU, F ;

RANGE, KJ .

MATERIALS RESEARCH BULLETIN, 1981, 16 (04) :413-417

← 1 2 3 →