000162107 001__ 162107
000162107 005__ 20251017144607.0
000162107 0247_ $$2doi$$a10.7566/JPSJ.88.114601
000162107 0248_ $$2sideral$$a123098
000162107 037__ $$aART-2019-123098
000162107 041__ $$aeng
000162107 100__ $$aIshimatsu, N.
000162107 245__ $$aPressure-induced collapse of the guest EU off-centering in type-I clathrate EU8Ga16Ge30
000162107 260__ $$c2019
000162107 5203_ $$aWe have revealed the pressure-induced collapse of the guest Eu off-centering in type-I clathrate Eu8Ga16Ge30 by the measurements of extended X-ray absorption fine structure (EXAFS) at the Ge K-edge in a temperature range of 10–300 K. Our analysis of the EXAFS spectra at ambient pressure confirmed that the guest Eu is located in the off-centered positions at ¿offset = 0.39(1) Å away from the center of the Ga=Ge tetradodecahedron cage (14-cage). However, with applying pressure to 13.1 GPa, ¿offset decreases to zero, and the atomic density of Eu is concentrated near the center of the 14-cage with a broad distribution. The present result demonstrates a close relationship between ¿offset and the size of the cage: ¿offset decreases when the 14-cage shrinks by applying pressure. With further compression, we have observed a drastic change in the EXAFS spectra due to amorphization. In the amorphous phase, the first nearest neighbor Ge–Ga=Ge bond is longer than in the crystal phase, whereas the guest Eu atom is located randomly with respect to the Ge atoms.
000162107 540__ $$9info:eu-repo/semantics/closedAccess$$aAll rights reserved$$uhttp://www.europeana.eu/rights/rr-f/
000162107 590__ $$a1.579$$b2019
000162107 591__ $$aPHYSICS, MULTIDISCIPLINARY$$b46 / 84 = 0.548$$c2019$$dQ3$$eT2
000162107 592__ $$a0.77$$b2019
000162107 593__ $$aPhysics and Astronomy (miscellaneous)$$c2019$$dQ2
000162107 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000162107 700__ $$aYokoyama, K.
000162107 700__ $$aOnimaru, T.
000162107 700__ $$aTakabatake, T.
000162107 700__ $$aSuekuni, K.
000162107 700__ $$aKawamura, N.
000162107 700__ $$aTsutsui, S.
000162107 700__ $$aMizumaki, M.
000162107 700__ $$aIna, T.
000162107 700__ $$aWatanuki, T.
000162107 700__ $$0(orcid)0000-0002-8021-8709$$aCuartero, V.
000162107 700__ $$aMathon, O.
000162107 700__ $$aPascarelli, S.
000162107 700__ $$aNishibori, E.
000162107 700__ $$aIrifune, T.
000162107 773__ $$g88, 11 (2019), 114601 [9 pp]$$pJ. Phys. Soc. Jpn.$$tJOURNAL OF THE PHYSICAL SOCIETY OF JAPAN$$x0031-9015
000162107 8564_ $$s1254558$$uhttps://zaguan.unizar.es/record/162107/files/texto_completo.pdf$$yVersión publicada
000162107 8564_ $$s2963447$$uhttps://zaguan.unizar.es/record/162107/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000162107 909CO $$ooai:zaguan.unizar.es:162107$$particulos$$pdriver
000162107 951__ $$a2025-10-17-14:15:54
000162107 980__ $$aARTICLE