Thermal measurements of single microcrystals of Mn(12) acetate have been performed with a particularly sensitive nanocalorimeter. Heat-capacity measurements as a function of applied magnetic field demonstrate magnetization quantum tunneling at the crossing of crystal-field levels. We present a theoretical model of the magnetic heat capacity of Mn(12) acetate that approximately agrees with experimental results. Temperature measurements as a function of a slowly scanned magnetic field confirm earlier magnetization measurements and suggest that the thermal coupling between bath and sample, as well as the thermal conductivity of the crystals, play a major role in the magnetization reversal. [S0163-1829(98)06041-X].
Magnetic-field-dependent thermodynamics of Mn12-acetate single crystals at low temperatures / F. Fominaya;J. Villain;T. Fournier;P. Gandit;J. Chaussy;A. Fort;A. Caneschi. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1098-0121. - STAMPA. - 59:(1999), pp. 519-528. [10.1103/PhysRevB.59.519]
Magnetic-field-dependent thermodynamics of Mn12-acetate single crystals at low temperatures
CANESCHI, ANDREA
1999
Abstract
Thermal measurements of single microcrystals of Mn(12) acetate have been performed with a particularly sensitive nanocalorimeter. Heat-capacity measurements as a function of applied magnetic field demonstrate magnetization quantum tunneling at the crossing of crystal-field levels. We present a theoretical model of the magnetic heat capacity of Mn(12) acetate that approximately agrees with experimental results. Temperature measurements as a function of a slowly scanned magnetic field confirm earlier magnetization measurements and suggest that the thermal coupling between bath and sample, as well as the thermal conductivity of the crystals, play a major role in the magnetization reversal. [S0163-1829(98)06041-X].File | Dimensione | Formato | |
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