Glassy transport phenomena in a phase-separated perovskite cobaltite

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

Research output: Contribution to journalArticle

39 Citations (Scopus)

Abstract

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
Volume73
Issue number2
DOIs
StatePublished - Feb 27 2006

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Spin glass
Perovskite
spin glass
Magnetoelectronics
electrical resistivity
Freezing
Phase separation
freezing
Ferroelectric materials
Aging of materials
Single crystals
Magnetic fields
conduction
temperature dependence
single crystals
matrices
electronics
magnetic fields
Temperature
cobaltite

Cite this

Glassy transport phenomena in a phase-separated perovskite cobaltite. / Wu, J.; Zheng, H.; Mitchell, J. F.; Leighton, C.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 73, No. 2, 020404, 27.02.2006.

Research output: Contribution to journalArticle

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