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Growth and characterization of pure and doped single crystals of $CuGeO_{3}$

Elizabeth, Suja and Babu, PK and Bhat, HL (1999) Growth and characterization of pure and doped single crystals of $CuGeO_{3}$. In: Journal of Crystal Growth, 204 (3). pp. 311-316.

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Good quality single crystals of copper metagermanite, CuGeO3, are grown by flux technique. Growth is carried out at relatively low temperatures by using Bi2O3 along with CuO in an optimal flux ratio. Besides rendering the procedure simple, lower growth temperature reduces growth defect concentration. Single crystals of Cu1 - xCoxGeO3 and CuGe1 - yGayO3 are grown by the same method for different values of x and y to investigate the influence of in-chain and off-chain doping on spin-Peierls (SP) transition. Change in color, morphology and surface features as a result of doping are briefly discussed. Spin-Peierls transition of these crystals is studied by susceptibility measurements on a commercial SQUID magnetometer. Cationic substitution resulted in reduction of spin-Peierls transition temperature (T-SP) of CuGeO3. Substitution of magnetic impurity cobalt in-chain site caused more pronounced effects such as suppression of SP phase.

Item Type: Journal Article
Publication: Journal of Crystal Growth
Publisher: Elsevier Science
Additional Information: Copyright of this article belongs to Elsevier Science.
Keywords: Flux technique;Spin-Peierls transition;Cationic substitution
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 23 Jul 2009 07:19
Last Modified: 19 Sep 2010 05:29
URI: http://eprints.iisc.ac.in/id/eprint/19587

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