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Multilevel model for magnetic deflagration in nanomagnet crystals
KTH, Centra, Nordic Institute for Theoretical Physics NORDITA. Stockholm Univ.
Vise andre og tillknytning
2017 (engelsk)Inngår i: Physical Review B, ISSN 2469-9950, E-ISSN 2469-9969, Vol. 95, nr 17, artikkel-id 174403Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

We extend the existing theoretical model for determining the characteristic features of magnetic deflagration in nanomagnet crystals. For the first time, all energy levels are accounted for calculation of the the Zeeman energy, the deflagration velocity, and other parameters. It reduces the final temperature and significantly changes the propagation velocity of the spin-flipping front. We also consider the effect of a strong transverse magnetic field, and show that the latter significantly modifies the spin-state structure, leading to an uncertainty concerning the activation energy of the spin flipping. Our front velocity prediction for a crystal of Mn-12 acetate in a longitudinal magnetic field is in much better agreement with experimental data than the previous reduced-model results.

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American Physical Society, 2017. Vol. 95, nr 17, artikkel-id 174403
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URN: urn:nbn:se:kth:diva-207889DOI: 10.1103/PhysRevB.95.174403ISI: 000400659900001Scopus ID: 2-s2.0-85024405315OAI: oai:DiVA.org:kth-207889DiVA, id: diva2:1103324
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QC 20170530

Tilgjengelig fra: 2017-05-30 Laget: 2017-05-30 Sist oppdatert: 2018-09-19bibliografisk kontrollert

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