Magneto-structural study of a Cr-doped CaRuO3

Ranjan, Rajeev ; Garg, Rohini ; Senyshyn, Anatoliy ; Hegde, M. S. ; Ehrenberg, Helmut ; Boysen, Hans (2009) Magneto-structural study of a Cr-doped CaRuO3 Journal of Physics: Condensed Matter, 21 (32). 326001_1-326001_6. ISSN 0953-8984

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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:Article
Source:Copyright of this article belongs to Institute of Physics Publishing.
ID Code:16509
Deposited On:15 Nov 2010 09:31
Last Modified:03 Jun 2011 07:14

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