Tuning Magnetic Avalanches in Mn12-ac

Details Tuning Magnetic Avalanches in Mn12-ac Tuning Magnetic Avalanches in Mn12-ac

2009-02-03

arxiv.org/abs/0902.0531v2

Physics

Condensed Matter

Materials Science

8 pages, 7 figures; discussion expanded and revised

Scientific paper

Using micron-sized Hall sensor arrays to obtain time-resolved measurements of the local magnetization, we report a systematic study in the molecular magnet Mn$_{12}$-acetate of magnetic avalanches controllably triggered in different fixed external magnetic fields and for different values of the initial magnetization. The speeds of propagation of the spin-reversal fronts are in good overall agreement with the theory of magnetic deflagration of Garanin and Chudnovsky \cite{Garanin}.

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