A comparative study on metamagnetic transitions in half-doped Pr0.45La0.05Ca0.5MnO3 and Pr0.45Gd0.05Ca0.5MnO3 manganites

Half-doped Pr0.5Ca0.5MnO3 is an ABO3-type, charge-ordered antiferromagnetic system with a negligible A-site cation size disorder (sigma2). The A-site substitution by larger or smaller ions than Pr3+/Ca2+ in this system increases sigma2. We have studied and compared the sigma2 and cation size effects...

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Bibliographic Details
Published in:Physica. B, Condensed matter Condensed matter, 2006-05, Vol.378-380, p.504-506
Main Authors: Mavani, K.R., Paulose, P.L.
Format: Article
Language:English
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Summary:Half-doped Pr0.5Ca0.5MnO3 is an ABO3-type, charge-ordered antiferromagnetic system with a negligible A-site cation size disorder (sigma2). The A-site substitution by larger or smaller ions than Pr3+/Ca2+ in this system increases sigma2. We have studied and compared the sigma2 and cation size effects on metamagnetic transitions by substituting 5 atomic percentage of isovalent larger ion La3+ or smaller ion Gd3+ at A-site in this system. We find that the La substitution induces successive sharp step-like metamagnetic transitions at low temperature, in contrast to a smooth metamagnetic transition induced by Gd substitution.
ISSN:0921-4526
DOI:10.1016/j.physb.2006.01.218