Determination of anisotropic magnetic susceptibility of a biaxial crystal via orientational fluctuation of its microcrystalline suspension under magnetic field

作者：Matsumoto Kenji; Fujita Keiji; Tanaka Tatsuya; Kimura Fumiko; Kimura Tsunehisa^*

来源：Japanese Journal of Applied Physics, 2014, 53(5): 055501.

DOI：10.7567/JJAP.53.055501

The ratio of the anisotropic magnetic susceptibility r(X) [(X-2 - X-3)/(X-1 - X-2)] of a biaxial crystal was determined using a suspension of its microcrystalline powder. The suspension was rotated in a static magnetic field and subjected to in situ X-ray diffraction measurement. Following the theory proposed previously to relate the X-ray half-widths to the orientation fluctuation, the experimentally obtained half-widths were translated to the orientation fluctuation that is relevant to the magnetic anisotropy X-2-X-3, X-1-X-3, and X-1-X-2. L-Alanine and D-mannitol microcrystals were investigated and their r(X) values were determined as 1.0 and 1.2, respectively, which were in good agreement with those reported in the literature. By using the determined r(X) value of L-alanine, it was demonstrated that this value is a crucial parameter for determining the experimental magnetic condition when preparing a three-dimensional magnetically oriented microcrystal array that produces high-quality X-ray diffractions.

• 出版日期2014-5