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Continuous measurement of XRD peak intensity of bismuth under magnetic field

A material which has a magnetic anisotropy rotates to reduce magnetization energy under a magnetic field, and finally the magnetic easy axis and the direction of magnetic field becomes the same direction. For clarification of the crystal rotation, crystal alignment benaviour of bismuth which has a m...

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Bibliographic Details
Published in:Journal of physics. Conference series 2009-03, Vol.156 (1), p.012003
Main Authors: Kohama, T, Iwai, K
Format: Article
Language:English
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Summary:A material which has a magnetic anisotropy rotates to reduce magnetization energy under a magnetic field, and finally the magnetic easy axis and the direction of magnetic field becomes the same direction. For clarification of the crystal rotation, crystal alignment benaviour of bismuth which has a magnetically anisotropic nature was examined in situ by X-ray diffraction during the static magnetic field imposition. Change of the bismuth (110) peak intensity in time was measured by X-ray diffraction to evaluate the crystal alignment. The alignment time decreased as the magnetic field strength increased. This tendency was similar to the theoretically calculated relaxation time. Aggregation of the bismuth particles decreases the driving force for the crystal alignment, which was in proportion to the magnetic susceptibility difference between the magnetically easy and hard axes. The effective difference in magnetic susceptibility for aggregated bismuth particles was estimated by measuring the alignment time of the particles under magnetic fields of various strengths. The estimated effective magnetic susceptibility difference increases with a decreasing magnetic field strength.
ISSN:1742-6596
1742-6588
1742-6596
DOI:10.1088/1742-6596/156/1/012003