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Larmor Precession and Debye Relaxation of Single-Domain Magnetic Nanoparticles
Z. Janosfalvi; J. Hakl; P. F. de Chatel
2014
Source PublicationAdvances in Condensed Matter Physics
ISSN1687-8108
AbstractThe numerous phenomenological equations used in the study of the behaviour of single-domain magnetic nanoparticles are described and some issues clarified by means of qualitative comparison. To enable a quantitative application of the model based on the Debye (exponential) relaxation and the torque driving the Larmor precession, we present analytical solutions for the steady states in presence of circularly and linearly polarized AC magnetic fields. Using the exact analytical solutions, we can confirm the insight that underlies Rosensweig's introduction of the "chord" susceptibility for an approximate calculation of the losses. As an important consequence, it can also explain experiments, where power dissipation for both fields was found to be identical in "root mean square" sense. We also find that this approximation provides satisfactory numerical accuracy only up to magnetic fields for which the argument of the Langevin function reaches the value 2.8.
description.department[janosfalvi, zs. ; hakl, j. ; de chatel, p. f.] inst nucl res, h-4001 debrecen, hungary. [de chatel, p. f.] new mexico state univ, dept phys, las cruces, nm 88003 usa. [de chatel, p. f.] chinese acad sci, inst met res, shenyang 110016, peoples r china. ; janosfalvi, z (reprint author), inst nucl res, pob 51, h-4001 debrecen, hungary. ; janosfalvi.zsuzsa@atomki.mta.hu
KeywordField Resonance Fluid
URL查看原文
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/72481
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Z. Janosfalvi,J. Hakl,P. F. de Chatel. Larmor Precession and Debye Relaxation of Single-Domain Magnetic Nanoparticles[J]. Advances in Condensed Matter Physics,2014.
APA Z. Janosfalvi,J. Hakl,&P. F. de Chatel.(2014).Larmor Precession and Debye Relaxation of Single-Domain Magnetic Nanoparticles.Advances in Condensed Matter Physics.
MLA Z. Janosfalvi,et al."Larmor Precession and Debye Relaxation of Single-Domain Magnetic Nanoparticles".Advances in Condensed Matter Physics (2014).
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