Effect of magnetic field on a spin-Peierls cuprate, CuGeO[sub 3]

Conference · Fri Apr 01 04:00:00 EST 1994 · Journal of Superconductivity; (United States)

OSTI ID:6662024

Hase, M; Sasago, Y; Uchinokura, K; Tokunaga, M; Miura, N ^[1]; Terasaki, I ^[2]; Obara, H ^[3]

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1. Univ. of Tokyo (Japan)
2. Univ. of Tokyo (Japan) International Superconductivity Technology Center, Tokyo (Japan)
3. Electrotechnical Lab., Ibaraki (Japan)

We measured the static magnetization of polycrystalline CuGeO[sub 3], which exhibits the spin-Peierls transition around 14.0 K in the absence of the magnetic field. The field dependence of the magnetization below 14.0 K shows a characteristic nonlinear process associated with a phase transition, and phase boundaries between the dimerized phases and other phases were obtained. The magnetic phase diagram qualitatively agrees with that of an organic spin-Peierls material. The phase transition is of first order below 10.0 K, and of second order above 10.0 K. Above 10.0 K, the critical field decreases from 13 to 0 T with increasing temperature. On the other hand, it is nearly independent of temperature below 10.0 K. 15 refs., 2 figs.

• OSTI ID: 6662024
• Report Number(s): CONF-930710--
• Conference Information: Journal Name: Journal of Superconductivity; (United States) Journal Volume: 7:2
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
360207* -- Ceramics
Cermets
& Refractories-- Superconducting Properties-- (1992-)
COPPER COMPOUNDS
CRITICAL FIELD
CRYSTALS
CUPRATES
DIAGRAMS
GERMANIUM COMPOUNDS
HIGH-TC SUPERCONDUCTORS
MAGNETIC FIELDS
MAGNETIZATION
OXYGEN COMPOUNDS
PHASE DIAGRAMS
PHASE STUDIES
PHYSICAL PROPERTIES
POLYCRYSTALS
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPOUNDS