Article (Scientific journals)
Stoner–Wohlfarth model for the anisotropic case
de Campos, Marcos Flavio; da Silva, Fernanda Sampaio; Perigo, Elio Alberto et al.
2013In Journal of Magnetism and Magnetic Materials, 345, p. 147-152
Peer reviewed
 

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Keywords :
Hysteresis; Texture; Coercivity
Abstract :
[en] The Stoner–Wohlfarth (SW) model was calculated for the anisotropic case, by assuming crystallographical texture distributions as Gaussian, Lorentzian and cos n (alpha). All these distributions were tested and both Gaussian and cos n (alpha) give similar results for Mr/Ms above 0.8. However, the use of cosn (alpha) makes it easier to find analytical expressions representing texture.The Lorentzian distribution is a suitable choice for not wel laligned magnets, or magnets with a high fraction of misaligned grains. It is discussed how to obtain the alignment degree Mr/Ms directly from two measurements of magnetic remanence at the transverse and parallel directions to the alignment direction of the magnet .It is demonstrated that even the wel laligned magnets with Mr/Ms=0.96 present coercive field of 60–70% of the anisotropy field, depending on the chosen distribution.The anisotropic SW model was used for discussing hysteresis squareness. Improving the crystalographical texture, the loop squareness also increases.
Disciplines :
Physics
Author, co-author :
de Campos, Marcos Flavio
da Silva, Fernanda Sampaio
Perigo, Elio Alberto ;  University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit
de Castro, Jose
Language :
English
Title :
Stoner–Wohlfarth model for the anisotropic case
Publication date :
2013
Journal title :
Journal of Magnetism and Magnetic Materials
ISSN :
0304-8853
Publisher :
Elsevier Science, Amsterdam, Netherlands
Volume :
345
Pages :
147-152
Peer reviewed :
Peer reviewed
Available on ORBilu :
since 09 January 2014

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