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 language||English (US)|
|Journal||Physical Review B - Condensed Matter and Materials Physics|
|State||Published - Feb 27 2006|