Origin of the universality of long-time thermal relaxations in hysteretic systems

Journal Article · Mon May 01 00:00:00 EDT 2000 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.373160· OSTI ID:20216213

Freidlin, M I ^[1]; Mayergoyz, I D ^[2]; Huang, M W ^[2]

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1. Mathematics Department, University of Maryland, College Park, Maryland 20742 (United States)
2. Department of Electrical and Computer Engineering, University of Maryland, College Park, Maryland 20742 (United States)

It is demonstrated that asymptotic temporal behavior of thermal noise is responsible for the universality of long-time thermal relaxations in hysteretic systems. By using the Preisach hysteresis model and by assuming stationary Gaussian noise, the {radical}(ln t) intermediate asymptotics for the thermal relaxations is derived along with a simple expression for the viscosity coefficient in terms of temperature and differential susceptibility. Experimental data supporting these analytical results are presented. (c) 2000 American Institute of Physics.

• OSTI ID: 20216213
• Journal Information: Journal of Applied Physics, Vol. 87, Issue 9; Other Information: PBD: 1 May 2000; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COBALT ALLOYS
CHROMIUM ALLOYS
PLATINUM ALLOYS
HYSTERESIS
MAGNETIZATION
NOISE
RELAXATION
MAGNETIC SUSCEPTIBILITY
EXPERIMENTAL DATA
THEORETICAL DATA