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Counterpart of the Darrieus-Landau instability at a magnetic deflagration front
KTH, Centres, Nordic Institute for Theoretical Physics NORDITA. Stockholm University, Sweden.
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2016 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 93, no 13, 134418Article in journal (Refereed) PublishedText
Abstract [en]

The magnetic instability at the front of the spin avalanche in a crystal of molecular magnets is considered. This phenomenon reveals similar features with the Darrieus-Landau instability, inherent to classical combustion flame fronts. The instability growth rate and the cutoff wavelength are investigated with respect to the strength of the external magnetic field, both analytically in the limit of an infinitely thin front and numerically for finite-width fronts. The presence of quantum tunneling resonances is shown to increase the growth rate significantly, which may lead to a possible transition from deflagration to detonation regimes. Different orientations of the crystal easy axis are shown to exhibit opposite stability properties. In addition, we suggest experimental conditions that could evidence the instability and its influence on the magnetic deflagration velocity.

Place, publisher, year, edition, pages
American Physical Society , 2016. Vol. 93, no 13, 134418
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Physical Sciences
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URN: urn:nbn:se:kth:diva-187008DOI: 10.1103/PhysRevB.93.134418ISI: 000373974800005ScopusID: 2-s2.0-84963770251OAI: oai:DiVA.org:kth-187008DiVA: diva2:928755
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QC 20160516

Available from: 2016-05-16 Created: 2016-05-16 Last updated: 2016-05-16Bibliographically approved

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Modestov, Mikhail
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Nordic Institute for Theoretical Physics NORDITA
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