Non-equilibrium Magnetic Properties of Single Crystalline La0.7Ca0.3CoO3

Details Non-equilibrium Magnetic Properties of Single Crystalline La0.7Ca0.3CoO3 Non-equilibrium Magnetic Properties of Single Crystalline La0.7Ca0.3CoO3

2005-11-03

arxiv.org/abs/cond-mat/0511066v1

PRB, 72, 144423 (2005)

Physics

Condensed Matter

Materials Science

21 pages including figures

Scientific paper

10.1103/PhysRevB.72.144423

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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