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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Official URL: http://iopscience.iop.org/0953-8984/21/32/326001
Related URL: http://dx.doi.org/10.1088/0953-8984/21/32/326001
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: | 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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