Experimental determination of the phonon density of states in filled skutterudites: evidence for a localized mode of the filling atom

被引：17
作者：
Viennois, R
Girard, L
Koza, MM
Mutka, H
Ravot, D
Terki, F
Charar, S
Tedenac, JC
机构：
[1] Univ Montpellier 2, Etud Semicond Grp, F-34095 Montpellier, France
[2] Univ Montpellier 2, Lab Physicochim Mat Condensee, F-34095 Montpellier, France
[3] Univ Lyon 1, Lab Phys Mat Condensee & Nanostruct, F-69622 Villeurbanne, France
[4] Inst Max Von Laue Paul Langevin, F-38042 Grenoble, France
来源：
PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2005年 / 7卷 / 08期
关键词：
D O I：
10.1039/b502655p
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The generalized density of states of LaFe4Sb12 and CeFe4Sb12 has been determined by inelastic neutron scattering and its main features are found to be in agreement with recently published calculations (J. L. Feldman, D. L. Singh, C. Kendziora, D. Mandrus and B. C. Sales, Phys. Rev. B, 2003, 68, 094301). In both compounds a localized vibrational contribution appears superposed on the low-energy Debye response. The distinct inelastic response of La in LaFe4Sb12 is obtained by subtraction of the data for the Ce filled compound and it shows even more clearly the resolution limited peak at 7 meV, attributed to the localized mode of La-atoms.
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页码：1617 / 1619
页数：3
相关论文
共 13 条
[1]   Nickel-substituted skutterudites: synthesis, structural and electrical properties [J].
Chapon, L ;
Ravot, D ;
Tedenac, JC .
JOURNAL OF ALLOYS AND COMPOUNDS, 1999, 282 (1-2) :58-63
[2]   Lattice dynamics of filled skutterudites:: La(Fe,Co)4Sb12 -: art. no. 094301 [J].
Feldman, JL ;
Singh, DJ ;
Kendziora, C ;
Mandrus, D ;
Sales, BC .
PHYSICAL REVIEW B, 2003, 68 (09)
[3]   Lattice dynamics of skutterudites: First-principles and model calculations for CoSb3 [J].
Feldman, JL ;
Singh, DJ .
PHYSICAL REVIEW B, 1996, 53 (10) :6273-6282
[4]   Lattice dynamics and reduced thermal conductivity of filled skutterudites [J].
Feldman, JL ;
Singh, DJ ;
Mazin, II ;
Mandrus, D ;
Sales, BC .
PHYSICAL REVIEW B, 2000, 61 (14) :R9209-R9212
[5]  
FELDMAN JL, 1999, P 18 INT C THERM IEE, P108
[6]   Neutron study of rare earth filling and physical properties in Ry(Fe,Ni)4Sb12 (with R=La or Ce) [J].
Girard, L ;
Viennois, R ;
Chapon, L ;
Haidoux, A ;
Mutka, H ;
Tedenac, JC ;
Ravot, D .
TWENTY-SECOND INTERNATIONAL CONFERENCE ON THERMOELECTRICS, PROCEEDINGS ICT '03, 2003, :72-75
[7]   Einstein oscillators in thallium filled antimony skutterudites [J].
Hermann, RP ;
Jin, RJ ;
Schweika, W ;
Grandjean, F ;
Mandrus, D ;
Sales, BC ;
Long, GJ .
PHYSICAL REVIEW LETTERS, 2003, 90 (13) :135505/1-135505/4
[8]   Localized vibrational modes in metallic solids [J].
Keppens, V ;
Mandrus, D ;
Sales, BC ;
Chakoumakos, BC ;
Dai, P ;
Coldea, R ;
Maple, MB ;
Gajewski, DA ;
Freeman, EJ ;
Bennington, S .
NATURE, 1998, 395 (6705) :876-878
[9]   FAR-INFRARED REFLECTION SPECTRA, OPTICAL AND DIELECTRIC-CONSTANTS, EFFECTIVE CHARGES, AND LATTICE-DYNAMICS OF THE SKUTTERUDITES COP3, COAS3, AND COSB3 [J].
LUTZ, HD ;
KLICHE, G .
PHYSICA STATUS SOLIDI B-BASIC RESEARCH, 1982, 112 (02) :549-557
[10]   Filled skutterudite antimonides: Electron crystals and phonon glasses [J].
Sales, BC ;
Mandrus, D ;
Chakoumakos, BC ;
Keppens, V ;
Thompson, JR .
PHYSICAL REVIEW B, 1997, 56 (23) :15081-15089
12