Continuous measurement of XRD peak intensity of bismuth under magnetic field

Kohama, Takenori; Iwai, Kazuo

doi:10.1088/1742-6596/156/1/012003

Cited by 1 publication

(4 citation statements)

References 16 publications

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“…Even in the case of small particles or nanoparticles of bismuth, the c-axis is an easy axis of magnetic orientation. [10][11][12][13] The sample cell filled with the particles dispersed in a viscous liquid is set in a magnetic field for a sufficiently long time for orientation to become stable and then rotated quickly to a certain angle about the optical axis. Viscous liquids and nanoparticles rotate in the same manner when the sample cell is rotated quickly as previously reported by Kimura and coworkers 6,7) and Kohama and coworkers.…”

Section: Spherical Bismuth Nanoparticlesmentioning

confidence: 99%

“…Viscous liquids and nanoparticles rotate in the same manner when the sample cell is rotated quickly as previously reported by Kimura and coworkers 6,7) and Kohama and coworkers. 10,11) After that, the magnetic torque starts to rotate the particles gradually, and the particles continue to rotate until they are reoriented. The light intensity returns perfectly to its original value when the particles are reoriented.…”

Section: Spherical Bismuth Nanoparticlesmentioning

confidence: 99%

“…Several methods have been used to measure anisotropic magnetic susceptibility. [6][7][8][9][10][11][12] Kimura and coworkers 6,7) observed the transient motion of carbon and polymer fibers of 1-4 mm length by using a microscope under a magnetic field. The anisotropic magnetic susceptibilities of the fibers were determined precisely by measuring the alignment times under several magnetic fields according to the theoretical equation describing the rotational motion of fiber particles in a viscous liquid.…”

Section: Introductionmentioning

confidence: 99%

“…Uyeda and coworkers 8,9) determined the susceptibility by using optical transmittance through small single crystals (∼500 nm) dispersed in liquid under static magnetic fields. Kohama and coworkers 10,11) measured the susceptibility of micrometer-sized bismuth powder particles dispersed in a viscous liquid by the transient recovery of the (110) peak intensity in the XRD pattern after rotating the sample under a magnetic field. Kitamura et al 12) determined the anisotropic magnetic susceptibility of bismuth nanospheres by measuring the dependence of the (110) peak intensity on static magnetic field strength up to 5 T. However, the determination of anisotropic magnetic susceptibility by transient optical transmission has advantages of being able to test particles of a wide range of sizes including nanoparticles, convenient detection, requiring only very small doses, and the possibility of using a mixture of several different types of particles.…”

Section: Introductionmentioning

confidence: 99%

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Optical measurement of anisotropic magnetic susceptibility for diamagnetic fine particles

Kitamura

Takahashi

Mogi

et al. 2015

Jpn. J. Appl. Phys.

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We have developed an apparatus that allows the observation of the transient rotational motion of fine particles under a high magnetic field in order to determine anisotropic magnetic susceptibility. The anisotropic susceptibilities of spherical nanoparticles of bismuth and commercially available carbon nanofibers were determined. The estimated Δχ = 3.9 × 10−5 of spherical bismuth nanoparticles with a diameter of 370 nm was fairly consistent with the value determined previously by the magnetic field dependence of diffraction peak intensity in the X-ray diffraction (XRD) pattern, but was slightly smaller than the value for the bulk crystal. In contrast, the transient behavior of carbon nanofibers did not obey the theoretical motion of a single crystal. The wide distribution of fiber lengths, the irregularity of the structure in the fiber, and the connections between the fibers are suggested for the anomalous behavior.

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