Magneto-structural study of a Cr-doped CaRuO3

Ranjan, Rajeev and Garg, Rohini and Senyshyn, Anatoliy and Hegde, MS and Ehrenberg, Helmut and Boysen, Hans (2009) Magneto-structural study of a Cr-doped CaRuO3. In: Journal Of Physics-Condensed Matter, 21 (32).

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Abstract

Temperature-dependent neutron powder diffraction, magnetization and XPS studies were carried out on an optimally Cr-doped CaRuO3, i.e. CaRu0.85Cr0.15O3 (CRC-15). XPS data revealed that Cr exist in 3+ and 6+ oxidation states. The charge dissociation preserves the overall 4+ nominal charge of the Ru site. Although ferromagnetic correlations develop around 100 K, the system exhibits a large coercive field below 50 K. The unit cell volume exhibits negative thermal expansion below 50 K since the lattice expansion due to the magnetostrictive effect outweighs the thermal contraction due to the phonon-driven mechanism.

Item Type:	Journal Article
Publication:	Journal Of Physics-Condensed Matter
Publisher:	Institute of Physics
Additional Information:	Copyrights of this article belongs to Institute of Physics.
Department/Centre:	Division of Physical & Mathematical Sciences > Mathematics
Date Deposited:	31 Dec 2009 07:00
Last Modified:	19 Sep 2010 05:40
URI:	http://eprints.iisc.ac.in/id/eprint/22071

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