Multidimensional instability and dynamics of spin-avalanches in crystals of nanomagnets
2014 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 113, no 21, 217206Article in journal (Refereed) Published
We obtain a fundamental instability of the magnetization-switching fronts in superparamagnetic and ferromagnetic materials such as crystals of nanomagnets, ferromagnetic nanowires, and systems of quantum dots with large spin. We develop the instability theory for both linear and nonlinear stages. By using numerical simulations we investigate the instability properties focusing on spin avalanches in crystals of nanomagnets. The instability distorts spontaneously the fronts and leads to a complex multidimensional front dynamics. We show that the instability has a universal physical nature, with a deep relationship to a wide variety of physical systems, such as the Darrieus-Landau instability of deflagration fronts in combustion, inertial confinement fusion, and thermonuclear supernovae, and the instability of doping fronts in organic semiconductors.
Place, publisher, year, edition, pages
American Physical Society , 2014. Vol. 113, no 21, 217206
Condensed Matter Physics
IdentifiersURN: urn:nbn:se:umu:diva-96684DOI: 10.1103/PhysRevLett.113.217206ISI: 000345745800012PubMedID: 25479521OAI: oai:DiVA.org:umu-96684DiVA: diva2:766171
FunderSwedish Research Council