Raman scattering investigation of filled skutterudite PrRu4P12

Ogita Norio

Udagawa Masayuki

Saha S.R.

Sato Hideyuki

Sugawara Hitoshi

Physica B : Condensed Matter

Raman scattering spectra of the single crystalline PrRu4P12 have been measured in the temperature region between 1.5 K and 300 K. Below TMI, new peaks appear at phonon region and these peaks are assigned as the Raman-active phonons with Pm^3 symmetry. While, the broad spectra in the lower energy region than 200cm.1 become sharp below TMI and the detailed polarization measurements conclude that these are the crystal field excitations(CF) due to two-different Pr sites. Furthermore, temperature dependence of the CF energy levels for Pr2 has been clarified.Raman scattering spectra of the single crystalline PrRu4P12 have been measured in the temperature region between 1.5 K and 300 K. Below TMI, new peaks appear at phonon region and these peaks are assigned as the Raman-active phonons with Pm3 symmetry. While, the broad spectra in the lower energy region than 200cm-1 become sharp below TMI and the detailed polarization measurements conclude that these are the crystal field excitations(CF) due to two-different Pr sites. Furthermore, temperature dependence of the CF energy levels for Pr2 has been clarified.

Skutterudite compounds

Raman scattering

CF excitation

Physics [ 420 ]

eng

Elsevier

Copyright (c) 2006 Elsevier Ltd.

[ISSN] 0921-4526

[DOI] 10.1016/j.physb.2006.01.077

[NCID] AA10673546

[DOI] http://dx.doi.org/10.1016/j.physb.2006.01.077 isVersionOf