An ac field probe for the magnetic ordering of magnets with random anisotropy

Details An ac field probe for the magnetic ordering of magnets with random anisotropy An ac field probe for the magnetic ordering of magnets with random anisotropy

2009-11-12

arxiv.org/abs/0911.2352v1

Appl. Phys. Lett. 95, 222508 (2009)

Physics

Condensed Matter

Materials Science

10 pages, 4 figures, to appear in Appl. Phys. Lett. volume 95, Issue 22, Isue date: 30 November 2009

Scientific paper

10.1063/1.3268473

A Monte Carlo simulation is carried out to investigate the magnetic ordering in magnets with random anisotropy (RA). Our results show peculiar similarities to recent experiments that the real part of ac susceptibility presents two peaks for weak RA and only one for strong RA regardless of glassy critical dynamics manifested for them. We demonstrate that the thermodynamic nature of the low-temperature peak is a ferromagnetic-like dynamic phase transition to quasi-long range order (QLRO) for the former. Our simulation, therefore, is able to be incorporated with the experiments to help clarify the existence of the QLRO theoretically predicted so far.

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