Rare Earth Dependence of Einstein Temperatures in Filled Skutterudite Compounds REFe4P12 (RE = La, Ce, Pr, Nd, and Sm)
スポンサーリンク
概要
- 論文の詳細を見る
Extended x-ray absorption fine structure (EXAFS) measurements were carried out at the K-edge of rare-earth ions in REFe4P12 (RE = La, Ce, Pr, Nd, and Sm) at various temperatures. Distance between a rare-earth atom and neighboring atoms in each REFe4P12 compound was determined in this work. The obtained results agree reasonably with previous results of diffraction experiments. The temperature dependence of EXAFS amplitude was successfully analyzed using the Einstein model in each compound. The Einstein temperatures obtained by the analyses show a significant rare-earth dependence. Quantitative comparison between the present EXAFS measurements and phonon measurements such as inelastic x-ray/neutron scattering suggests that reduced mass treatment is essential for estimating Einstein temperatures. This indicates that finite binding energy exists between a rare-earth atom and P atoms at least in REFe4P12 compounds.
- 2011-07-15
著者
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TSUTSUI Satoshi
Research and Utilization Division, SPring-8 JASRI
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Tsutsui Satoshi
Japan Synchrotron Radiation Res. Inst. Hyogo Jpn
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Tsutsui Satoshi
Japan Synchrotron Radiation Research Institute Spring-8
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MIZUMAKI Masaichiro
Japan Synchrotron Radiation Research Institute
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URUGA Tomoya
Japan Synchrotron Radiation Research Institute
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SUGAWARA Hitoshi
Graduate School of Science, Tokyo Metropolitan University
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Tanida Hajime
Japan Synchro. Radi. Insti.
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Kikuchi Daisuke
Department Of Applied Chemistry Muroran Institute Of Technology
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Tsutsui Satoshi
Japan Synchrotron Radiation Research Institute
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Sato Hideyuki
Department Of Applied Chemistry Faculty Of Science And Technology Keio University
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Mizumaki Masaichiro
Japan Synchrotron Radiation Research Institute, Sayo, Hyogo 679-5198, Japan
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Uruga Tomoya
Japan Synchrotron Radiation Research Institute, Sayo, Hyogo 679-5198, Japan
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TANIDA Hajime
Experimental Facilities Division, Japan Synchrotron Radiation Research Institute
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Tanida Hajime
SPring-8, Japan Synchrotron Radiation Institute, Kouto, Sayo, Hyogo 679-5148, Japan
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Tanida Hajime
Japan Synchrotron Radiation Research Institute, Sayo, Hyogo 679-5198, Japan
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Tsutsui Satoshi
Japan Synchrotron Radiation Research Institute, SPring-8, Hyogo 679-5198, Japan
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Tsutsui Satoshi
SPring-8/JASRI, Sayo, Hyogo 679-5198, Japan
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Sugawara Hitoshi
Graduate School of Science, Kobe University, Kobe 657-8501, Japan
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