TY - JOUR
T1 - Glassy transport phenomena in a phase-separated perovskite cobaltite
AU - Wu, J.
AU - Zheng, H.
AU - Mitchell, J. F.
AU - Leighton, C.
PY - 2006/2/27
Y1 - 2006/2/27
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevB.73.020404
DO - 10.1103/PhysRevB.73.020404
M3 - Article
AN - SCOPUS:33144488221
SN - 1098-0121
VL - 73
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 2
M1 - 020404
ER -