Coupled structural/magnetocrystalline anisotropy transitions in the doped perovskite cobaltite Pr1-x Srx CoO3

C. Leighton, D. D. Stauffer, Q. Huang, Y. Ren, S. El-Khatib, M. A. Torija, J. Wu, J. W. Lynn, L. Wang, N. A. Frey, H. Srikanth, J. E. Davies, Kai Liu, J. F. Mitchell

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36 Scopus citations

Abstract

Years of intensive work on perovskite manganites has led to a detailed understanding of the phenomena that emerge from competition between the electronic and lattice degrees of freedom in these correlated electron systems. It is well understood that the related cobaltites provide an additional spin-state degree of freedom. Here, we use the magnetic properties of a particular cobaltite, Pr1-x Srx CoO3, to demonstrate the vital role played by a further ingredient often negligible in manganites; magnetocrystalline anisotropy. Pr1-x Srx CoO3 exhibits an anomalous "double magnetic transition" that cannot be ascribed to a spin-state transition or the usual charge/orbital/antiferromagnetic ordering and has thus far evaded explanation. We show that this is actually due to a coupled structural/magnetocrystalline anisotropy transition driven, in this case, by Pr-O hybridization. The results point to the existence of a distinct class of phenomena in the cobaltites due to the unique interplay between structure and magnetic anisotropy.

Original languageEnglish (US)
Article number214420
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume79
Issue number21
DOIs
StatePublished - Jun 15 2009

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