Mean first-passage times for an ac-driven magnetic moment of a nanoparticle

Details Mean first-passage times for an ac-driven magnetic moment of a nanoparticle Mean first-passage times for an ac-driven magnetic moment of a nanoparticle

2006-10-31

arxiv.org/abs/cond-mat/0610867v2

Europhys. Lett., 76 (6), pp. 1001-1007 (2006)

Physics

Condensed Matter

Statistical Mechanics

7 pages, 1 figure

Scientific paper

10.1209/epl/i2006-10403-3

The two-dimensional backward Fokker-Planck equation is used to calculate the mean first-passage times (MFPTs) of the magnetic moment of a nanoparticle driven by a rotating magnetic field. It is shown that a magnetic field that is rapidly rotating in the plane {\it perpendicular} to the easy axis of the nanoparticle governs the MFPTs just in the same way as a static magnetic field that is applied {\it along} the easy axis. Within this framework, the features of the magnetic relaxation and net magnetization of systems composed of ferromagnetic nanoparticles arising from the action of the rotating field are revealed.

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