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Spin-phonon avalanches in Mn-12 acetate

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We report experimental studies and suggest a quantitative model of spin relaxation in Mn12 acetate in a pulsed magnetic field in the temperature range 1.95.0 K. When the field applied along the anisotropy axis is swept at 140 T/s through a nonmagnetized Mn12 acetate sample, the samples magnetization switches, within a few milliseconds, from zero to saturation at a well-defined field whose value depends on temperature but is quantized in units of 0.46 T. A quantitative explanation of the effect is given in terms of a spin-phonon avalanche combined with thermally assisted resonant spin tunneling.

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BARCO, Enrique del, et al. Spin-phonon avalanches in Mn-12 acetate. Physical Review B. 1999. Vol. 60, num. 17, pags. 11898-11901. ISSN 0163-1829. [consulted: 25 of May of 2026]. Available at: https://hdl.handle.net/2445/10661

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