FIZIKA A 1 (1992) 3,  231-235

LETTER TO THE EDITOR

ON THE NON-THERMAL RELAXATION TIME IN THE MAGNETIC QUANTUM TUNNELING

MARIAN APOSTOL
Centre de Recherches sur les Trés Basses Températures, CNRS, PB 166 X, 38042 Grenoble-Cédex 9, France

Received 14 September 1992

The domain-wall concept is employed to derive the relaxation time of the macroscopic quantum tunneling in small magnetic particles as a function of temperature and magnetic field. The result is used to analyze the recently reported experimental data.

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