CLUSTER THEORY FOR THERMOREMANENT MAGNETISATION.

A. Khater, J. Ferre, P. Meyer

Research output: Contribution to journalArticle

Abstract

Calculations are presented for the thermoremanent magnetization m(t) in magnetic materials using a cluster model for their spin-system. The distribution employed for the cluster sizes is Poissonian. We derive for m(t) a form which is a modified power law, consisting of the product of a power law (t/ tau //0)** minus ** alpha and a positive polynomial in alpha 1n(t/ tau //0). alpha is linear with temperature. The thermoremanent magnetization decays linearly with 1n(t/ tau //0) over two distinct regimes, one which has been obtained previously, at short observations times, and another that results from the competition between the power law and the polynomial. This second regime occurs significantly for the observation times 10** minus **3 s less than equivalent to t less than equivalent to 10**3 s probed mostly by experimental techniques. With increasing temperature, the power law dominates and m(t) decays strongly though non-exponentially.

Original languageEnglish
Pages (from-to)874-876
Number of pages3
JournalPhysica Scripta
Volume35
Issue number6
Publication statusPublished - Jun 1987
Externally publishedYes

Fingerprint

Magnetization
Power Law
magnetization
polynomials
Decay
Positive Polynomials
Spin Systems
decay
magnetic materials
Linearly
Distinct
Polynomial
temperature
products
Observation
Model

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Khater, A., Ferre, J., & Meyer, P. (1987). CLUSTER THEORY FOR THERMOREMANENT MAGNETISATION. Physica Scripta, 35(6), 874-876.

CLUSTER THEORY FOR THERMOREMANENT MAGNETISATION. / Khater, A.; Ferre, J.; Meyer, P.

In: Physica Scripta, Vol. 35, No. 6, 06.1987, p. 874-876.

Research output: Contribution to journalArticle

Khater, A, Ferre, J & Meyer, P 1987, 'CLUSTER THEORY FOR THERMOREMANENT MAGNETISATION.', Physica Scripta, vol. 35, no. 6, pp. 874-876.
Khater A, Ferre J, Meyer P. CLUSTER THEORY FOR THERMOREMANENT MAGNETISATION. Physica Scripta. 1987 Jun;35(6):874-876.
Khater, A. ; Ferre, J. ; Meyer, P. / CLUSTER THEORY FOR THERMOREMANENT MAGNETISATION. In: Physica Scripta. 1987 ; Vol. 35, No. 6. pp. 874-876.
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