Glassy transport phenomena in a phase-separated perovskite cobaltite

J. Wu, H. Zheng, J. F. Mitchell, C. Leighton

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41 Scopus citations


We demonstrate that single-crystal La1-x Srx CoO3 in the semiconducting spin-glass phase (x<0.18) displays a strong interplay between electronic conduction and spin-glass freezing. The resistivity exhibits a bifurcation of zero-field cooled and field-cooled temperature dependences, glassy response to application and removal of magnetic fields, and, most remarkably, a waiting time or "aging" effect directly in the resistivity. This behavior has its origin in the magnetoelectronic phase separation into nanoscopic ferromagnetic clusters embedded in a nonferromagnetic matrix, analogous to relaxor ferroelectrics.

Original languageEnglish (US)
Article number020404
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number2
StatePublished - Feb 27 2006


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