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Title: Propagation of Magnetic Avalanches in Mn12Ac at High Field Sweep Rates
Author: Decelle, W.
Vanacken, J.
Moshchalkov, V. V.
Tejada Palacios, Javier
Hernández Ferràs, Joan Manel
Macià Bros, Ferran
Keywords: Física de partícules
Camps magnètics
Particle physics
Magnetic fields
Issue Date: 2009
Publisher: American Physical Society
Abstract: Time-resolved measurements of the magnetization reversal in single crystals of Mn 12 Ac in pulsed magnetic fields, at magnetic field sweep rates from 1.5     kT / s up to 7     kT / s , suggest a new process that cannot be scaled onto a deflagrationlike propagation driven by heat diffusion. The sweep rate dependence of the propagation velocity, increasing from a few 100     m / s up to the speed of sound in Mn 12 Ac , indicates the existence of two new regimes at the highest sweep rates, with a transition around 4     kT / s that can be understood as a magnetic deflagration-to-detonation transition.
Note: Reproducció del document publicat a:
It is part of: Physical Review Letters, 2009, vol. 102, num. 2, p. 027203
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ISSN: 0031-9007
Appears in Collections:Articles publicats en revistes (Física de la Matèria Condensada)

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