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Elastic properties of filled-Skutterudite compounds probed by Mössbauer nuclei |
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| Authors: | S Tsutsui J Umemura H Kobayashi T Tazaki S Nasu Y Kobayashi Y Yoda H Onodera H Sugawara T D Matsuda D Kikuchi H Sato C Sekine I Shirotani |
| Institution: | (1) Japan Synchrotron Radiation Research Institute, SPring-8, Mikazuki, Sayo, Hyogo 679-5198, Japan;(2) Graduate School of Materials Science, University of Hyogo, Kamigori, Hyogo 678-1297, Japan;(3) Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan;(4) RIKEN, Wako, Saitama 351-0198, Japan;(5) Graduate School of Science, Tohoku University, Sendai, Miyagi 980-8578, Japan;(6) Faculty of Integrated Arts and Sciences, University of Tokushima, Tokushima, Tokushima 770-8502, Japan;(7) Advanced Science Research Center, Japan Atomic Energy Research Institute, Tokai, Ibaraki 319-1195, Japan;(8) Graduate School of Science, Tokyo Metropolitan University, Hachioji, Tokyo 192-0937, Japan;(9) Department of Electrical and Electronic Engineering, Muroran Institute of Technology, Muroran, Hokkaido 050-8585, Japan |
| Abstract: | We have carried out Mössbauer spectroscopy and nuclear resonant inelastic scattering to elucidate the lattice dynamics in filled-Skutterudite compounds, especially phosphides. The second-order Doppler shift obeys the Debye model in RFe4P12. Nuclear quadrupole interaction reveals an unusual temperature dependence in these compounds. An anomaly is observed in 57Fe nuclear resonant inelastic scattering of these compounds. The energy where the anomaly observed in SmFe4P12 agrees with the phonon excitation energy observed by 149Sm nuclear resonant inelastic scattering. We have also performed the 99Ru Mössbauer measurements of SmRu4P12. |
| Keywords: | filled-Skutterudite second-orderDoppler shift nuclear quadrupole interaction nuclear resonant inelastic scattering |
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