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Multilevel model for magnetic deflagration in nanomagnet crystals

O. Jukimenko ; M. Modestov ; C. M. Dion ; Mattias Marklund (Institutionen för fysik, Kondenserade materiens teori (Chalmers)) ; V. Bychkov
Physical Review B: covering condensed matter and materials physics (2469-9950). Vol. 95 (2017), 17,
[Artikel, refereegranskad vetenskaplig]

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.



Denna post skapades 2017-06-20. Senast ändrad 2017-06-20.
CPL Pubid: 249995

 

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Institutioner (Chalmers)

Institutionen för fysik, Kondenserade materiens teori (Chalmers)

Ämnesområden

Den kondenserade materiens fysik

Chalmers infrastruktur