Non-equilibrium Magnetic Properties of Single Crystalline La0.7Ca0.3CoO3
Asish K. Kundu, P. Nordblad, C. N. R. Rao
TL;DR
This study investigates the complex magnetic behaviors of La0.7Ca0.3CoO3 single crystals, revealing ferromagnetic and spin-glass phases with strong anisotropy and non-equilibrium dynamics below 170 K.
Contribution
It provides detailed experimental insights into the non-equilibrium magnetic properties and anisotropic behaviors of La0.7Ca0.3CoO3 across different magnetic phases.
Findings
Ferromagnetic order below 170 K
Re-entrant spin-glass phase below 100 K
Strong directional dependence of magnetic properties
Abstract
Magnetic and electric properties of a single crystal of La0.7Ca0.3CoO3 have been experimentally studied. The system attains a ferromagnetic spontaneous moment below 170 K and exhibits a re-entrant spin-glass phase below 100 K. In the ordered and the re-entrant phases, the low field magnetic properties are strongly direction dependent, showing considerably higher magnetization values perpendicular than parallel to the c-axis. Magnetic relaxation experiments show that both the ferromagnetic and the re-entrant spin-glass phases are non-equilibrium states, where the system exhibits magnetic aging characteristic of spin-glasses and disordered and frustrated ferromagnets.
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