MAGNETIC EXCITATIONS IN CUGEO3

被引：13

作者：

NISHI, M ^{[1
]}

FUJITA, O ^{[1
]}

AKIMITSU, J ^{[1
]}

KAKURAI, K ^{[1
]}

FUJII, Y ^{[1
]}

机构：

[1] AOYAMA GAKUIN UNIV,DEPT PHYS,TOKYO 157,JAPAN

来源：

PHYSICA B | 1995年 / 213卷

关键词：

D O I：

10.1016/0921-4526(95)00128-V

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

In the inorganic spin-Peierls compound CuGeO3, we found a pronounced anisotropic magnetic energy dispersion, i.e. intra-chain exchange J(c) approximate to 10.4meV, inter-chain exchanges J(b) approximate to 0.1J(c), and J(a) approximate to -0.01J(c) and gap energy 2.1meV extrapolated to T = O K. We also observed critical scattering at (0,1,1/2) above T-sp. The ratio of the correlation lengths xi(c)/xi(b) is in good agreement with that obtained from X-ray scattering at (1/2,1,1/2) by Pouget et al. This fact suggests that the Cu2+ spins fluctuate to form singlet-pair short-range order, but not to form ordinary antiferromagnetic order above T-sp.

引用

页码：275 / 277

页数：3

共 10 条

[1]

desCloizeaux J., 1962, PHYS REV, V128, P2131, DOI DOI 10.1103/PHYSREV.128.2131

[2] 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

[3] 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

[4] DIMERIZATION OF CUGEO3 IN THE SPIN-PEIERLS STATE [J].

HIROTA, K ;

COX, DE ;

LORENZO, JE ;

SHIRANE, G ;

TRANQUADA, JM ;

HASE, M ;

UCHINOKURA, K ;

KOJIMA, H ;

SHIBUYA, Y ;

TANAKA, I .

PHYSICAL REVIEW LETTERS, 1994, 73 (05) :736-739

[5] SPIN DYNAMICS IN ONE-DIMENSIONAL ANTIFERROMAGNET (CD3)4NMNCL3 [J].

HUTCHINGS, MT ;

SHIRANE, G ;

BIRGENEAU, RJ ;

HOLT, SL .

PHYSICAL REVIEW B-SOLID STATE, 1972, 5 (05) :1999-+

[6] ELECTRON-DIFFRACTION STUDY OF THE INORGANIC SPIN-PEIERLS SYSTEM CUGEO3 [J].

KAMIMURA, O ;

TERAUCHI, M ;

TANAKA, M ;

FUJITA, O ;

AKIMITSU, J .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1994, 63 (07) :2467-2471

[7]

LIU Q, 1993, SYNTHETIC MET, V55, P1840

[8] NEUTRON-SCATTERING STUDY ON THE SPIN-PEIERLS TRANSITION IN A QUASI-ONE-DIMENSIONAL MAGNET CUGEO3 [J].

NISHI, M ;

FUJITA, O ;

AKIMITSU, J .

PHYSICAL REVIEW B, 1994, 50 (09) :6508-6510

[9] STRUCTURAL EVIDENCE FOR A SPIN PEIERLS GROUND-STATE IN THE QUASI-ONE-DIMENSIONAL COMPOUND CUGEO3 [J].

POUGET, JP ;

REGNAULT, LP ;

AIN, M ;

HENNION, B ;

RENARD, JP ;

VEILLET, P ;

DHALENNE, G ;

REVCOLEVSCHI, A .

PHYSICAL REVIEW LETTERS, 1994, 72 (25) :4037-4040

[10] CRYSTAL STRUCTURE OF CUGEO3 [J].

VOLLENKL.H ;

WITTMANN, A ;

NOWOTNY, H .

MONATSHEFTE FUR CHEMIE, 1967, 98 (04) :1352-&

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