Studying the reversal mode of the magnetization vector versus applied field angle using generalized magneto-optical ellipsometry

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The authors used the technique of vector Generalized Magneto-optical Ellipsometry to study the behavior of the magnetization vector of a 50 Co thin film as a function of external field magnitude and direction. With this method, which determines the both the direction and magnitude of the magnetization, averaged over the 1 mm incident laser beam, they were able to determine the relative contributions of magnetization rotation and domain formation to the reversal of M. The Co sample had a uniaxial in-plane anisotropy. The authors found that when the angle between the applied field and the easy axis was greater than ... continued below

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14 p.

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Pufall, M. R. & Berger, A. October 26, 1999.

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The authors used the technique of vector Generalized Magneto-optical Ellipsometry to study the behavior of the magnetization vector of a 50 Co thin film as a function of external field magnitude and direction. With this method, which determines the both the direction and magnitude of the magnetization, averaged over the 1 mm incident laser beam, they were able to determine the relative contributions of magnetization rotation and domain formation to the reversal of M. The Co sample had a uniaxial in-plane anisotropy. The authors found that when the angle between the applied field and the easy axis was greater than {approximately} 40 degrees, the reversal occurred primarily by rotation of the magnetization, accompanied by a small reduction of the magnitude of M. In this angular region, the critical field-the field at which there is a large jump in the angle of M -- as a function of applied field angle followed a coherent rotation model. However, at applied field angles less than 40 degrees to the easy axis, they found a larger reduction in {vert_bar}M{vert_bar} occurring before and during the jump in the magnetization angle. The jump also occurred at fields much lower than those predicted by the coherent rotation model, indicating a reversal mode initiated by domain formation.

Physical Description

14 p.

Notes

OSTI as DE00750563

Medium: P; Size: 14 pages

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  • 44th Annual Conference on Magnetism and Magnetic Materials, San Jose, CA (US), 11/15/1999--11/18/1999

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  • Report No.: ANL/MSD/CP-100334
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 750563
  • Archival Resource Key: ark:/67531/metadc712542

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  • October 26, 1999

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  • Sept. 12, 2015, 6:31 a.m.

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  • April 7, 2017, 2:42 p.m.

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Pufall, M. R. & Berger, A. Studying the reversal mode of the magnetization vector versus applied field angle using generalized magneto-optical ellipsometry, article, October 26, 1999; Illinois. (digital.library.unt.edu/ark:/67531/metadc712542/: accessed September 26, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.