The dot-vacancy contribution to two-fold anisotropy of magnetic dot array

Peter Majchrak; Denis Horvath; Martin Gmitra; Ivo Vavra

doi:10.1117/12.560182

7 April 2004 The dot-vacancy contribution to two-fold anisotropy of magnetic dot array

Peter Majchrak, Denis Horvath, Martin Gmitra, Ivo Vavra

Proceedings Volume 5445, Microwave and Optical Technology 2003; (2004) https://doi.org/10.1117/12.560182
Event: Microwave and Optical Technology 2003, 2003, Ostrava, Czech Republic

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.

Citation Download Citation

Peter Majchrak, Denis Horvath, Martin Gmitra, and Ivo Vavra "The dot-vacancy contribution to two-fold anisotropy of magnetic dot array", Proc. SPIE 5445, Microwave and Optical Technology 2003, (7 April 2004); https://doi.org/10.1117/12.560182

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