Título:
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Propagation of Magnetic Avalanches in Mn12Ac at High Field Sweep Rates
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Autor/a:
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Decelle, W.; Vanacken, J.; Moshchalkov, V. V.; Tejada Palacios, Javier; Hernández Ferràs, Joan Manel; Macià Bros, Ferran
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Otros autores:
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Universitat de Barcelona |
Abstract:
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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. |
Materia(s):
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-Física de partícules -Camps magnètics -Particle physics -Magnetic fields |
Derechos:
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(c) American Physical Society, 2009
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Tipo de documento:
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Artículo Artículo - Versión publicada |
Editor:
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American Physical Society
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