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Effect of in-chain and off-chain doping on the spin-peierls transition in CuGeO3 single crystals

Babu, PK and Elizabeth, S and Bhat, HL (1998) Effect of in-chain and off-chain doping on the spin-peierls transition in CuGeO3 single crystals. In: Solid State Communications, 106 (3). pp. 149-152.

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Abstract

The effect of cationic substitution on a spin Peierls (SP) transition in CuGeO3 single crystals is studied by susceptibility measurements. In-chain and off-chain doping were carried out by substituting cobalt in the copper site and gallium in the germanium site respectively. SP transition is found to be very sensitive to nature and concentration of dopant. Increasing gallium concentration induces a systematic reduction in transition temperature (TSP) whereas magnetic impurity cobalt causes its drastic reduction. 1 at% cobalt is sufficient to suppress SP transition completely Influence of magnetic impurity with high spin value disrupting the spin-1/2 chain is discussed

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Elsevier Science.
Keywords: Quasi-1D-spin chain;Spin-Peierls transition;Dimerization.
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 02 Jun 2009 06:16
Last Modified: 19 Sep 2010 05:02
URI: http://eprints.iisc.ernet.in/id/eprint/18459

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