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X-Ray Determination of Mean Square Amplitudes of Vibration and Associated Debye Temperatures of Rare Earth Hexagonal Close Packed Elements of Nd, Gd and Tb

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Integrated intensities of the Debye-Waller factor of neodymium (Nd), gadolinium (Gd) and terbium (Tb) have been measured at room temperatures. Debye-Waller factors, associated Debye temperatures and the directional mean square amplitudes of vibration of rare earth hexagonal close packed elements of Nd, Gd and Tb have been obtained from X-ray integrated intensities. The integrated intensities have been measured with a Philips 3020 powder diffractometer fitted with a proportional counter using filtered CuKα radiation and have been corrected for thermal diffuse scattering. Within the limits of experimental errors, the anisotropy observed in these parameters is negligible. The experimental values of directional Debye temperature have been compared with corresponding values obtained from theoretical calculations. Vacancy formation energies of Nd, Gd and Tb have been estimated using a relation connecting it with the X-ray Debye temperature.
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Keywords: DEBYE TEMPERATURE; HCP RARE EARTH ELEMENT VACANCY FORMATION ENERGY; X-RAY DIFFRACTION

Document Type: Research Article

Publication date: December 1, 2013

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  • Journal of Advanced Physics is an interdisciplinary peer-reviewed journal consolidating research activities in all experimental and theoretical aspects of advanced physics. The journal aims in publishing articles of novel and frontier physics that merit the attention and interest of the whole physics community. JAP publishes review articles, full research articles, short communications of important new scientific and technological findings in all latest research aspects of physics.
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