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Proceedings Paper

The dot-vacancy contribution to two-fold anisotropy of magnetic dot array
Author(s): Peter Majchrak; Denis Horvath; Martin Gmitra; Ivo Vavra
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Paper Abstract

A study of the impact of the magnetic dot-vacancy and biasing field on the basic magnetic properties of magnetic dot array is reported. Magnetic bias is a constant magnetic field applied simultaneously with the remagnetization field, which is oriented perpendicularly to the remagnetization field. Simulations, which are presented, deal with the magnetic dot arrays in rotating magnetic field and in-line remagnetization field with the dot-vacancies in various positions. The results led us to conclude, that amplitude of two-fold magnetization contribution increases with asymmetry of the position of dot-vacancy regarding to the center of array. The non-zero bias and the presence of magnetic defect are resulting in asymmetric behavior of magnetization response. For characterization of asymmetrical hysteresis loops was defined the specific coefficient of asymmetry. This quantitative characterization of asymmetry allows to determine the range of relevant biases leading to external two-fold contributions to magnetic anisotropy of array.

Paper Details

Date Published: 7 April 2004
PDF: 4 pages
Proc. SPIE 5445, Microwave and Optical Technology 2003, (7 April 2004); doi: 10.1117/12.560182
Show Author Affiliations
Peter Majchrak, Institute of Electrical Engineering (Slovak Republic)
Denis Horvath, Univ. of P.J. Safarik (Slovak Republic)
Martin Gmitra, Univ. of P.J. Safarik (Slovak Republic)
Ivo Vavra, Institute of Electrical Engineering (Slovak Republic)

Published in SPIE Proceedings Vol. 5445:
Microwave and Optical Technology 2003
Jaromir Pistora; Kamil Postava; Miroslav Hrabovsky; Banmali S. Rawat, Editor(s)

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