Raman scattering of RB6 (R = Ca, Ce, Pr, Gd, Dy and Yb)

Norio Ogita; Shinji Nagai; Naoki Okamoto; Masayuki Udagawa; Fumitoshi Iga; Masafumi Sera; Jun Akimitsu; Satoru Kunii

doi:10.1016/S0921-4526(02)02513-9

Raman scattering of RB₆ (R = Ca, Ce, Pr, Gd, Dy and Yb)

Norio Ogita, Shinji Nagai, Naoki Okamoto, Masayuki Udagawa, Fumitoshi Iga, Masafumi Sera, Jun Akimitsu, Satoru Kunii

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

In Raman scattering spectra of RB₆, anomalous peaks have been found below 200 cm^-1 for the R⁺³B₆, except for phonons and CEF excitations. Their peak intensities decrease with decreasing temperature, and this temperature dependence correlates with that of the mean square displacement of R. Furthermore, their energies decrease with the increase of the cage size of B. This new excitation can be attributed to a local vibration of the R ion, which can be regarded as "rattler" in the cage of B.

Original language	English
Pages (from-to)	661-662
Number of pages	2
Journal	Physica B: Condensed Matter
Volume	329-333
Issue number	II
DOIs	https://doi.org/10.1016/S0921-4526(02)02513-9
Publication status	Published - May 2003
Externally published	Yes

Keywords

Raman scattering
Rare earth hexaboride
Rattling mode of rare-earth ion

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

Access to Document

10.1016/S0921-4526(02)02513-9

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title = "Raman scattering of RB6 (R = Ca, Ce, Pr, Gd, Dy and Yb)",

abstract = "In Raman scattering spectra of RB6, anomalous peaks have been found below 200 cm-1 for the R+3B6, except for phonons and CEF excitations. Their peak intensities decrease with decreasing temperature, and this temperature dependence correlates with that of the mean square displacement of R. Furthermore, their energies decrease with the increase of the cage size of B. This new excitation can be attributed to a local vibration of the R ion, which can be regarded as {"}rattler{"} in the cage of B.",

keywords = "Raman scattering, Rare earth hexaboride, Rattling mode of rare-earth ion",

author = "Norio Ogita and Shinji Nagai and Naoki Okamoto and Masayuki Udagawa and Fumitoshi Iga and Masafumi Sera and Jun Akimitsu and Satoru Kunii",

note = "Funding Information: This work is supported in part by a Grant-in-Aid for COE Research (No.13CE2002) of the Ministry of Education, Culture, Sports, Science and Technology of Japan. The low temperature experiments is supported by the cryogenic center of Hiroshima University.",

year = "2003",

month = may,

doi = "10.1016/S0921-4526(02)02513-9",

language = "English",

volume = "329-333",

pages = "661--662",

journal = "Physica B: Condensed Matter",

issn = "0921-4526",

publisher = "Elsevier",

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TY - JOUR

T1 - Raman scattering of RB6 (R = Ca, Ce, Pr, Gd, Dy and Yb)

AU - Ogita, Norio

AU - Nagai, Shinji

AU - Okamoto, Naoki

AU - Udagawa, Masayuki

AU - Iga, Fumitoshi

AU - Sera, Masafumi

AU - Akimitsu, Jun

AU - Kunii, Satoru

N1 - Funding Information: This work is supported in part by a Grant-in-Aid for COE Research (No.13CE2002) of the Ministry of Education, Culture, Sports, Science and Technology of Japan. The low temperature experiments is supported by the cryogenic center of Hiroshima University.

PY - 2003/5

Y1 - 2003/5

N2 - In Raman scattering spectra of RB6, anomalous peaks have been found below 200 cm-1 for the R+3B6, except for phonons and CEF excitations. Their peak intensities decrease with decreasing temperature, and this temperature dependence correlates with that of the mean square displacement of R. Furthermore, their energies decrease with the increase of the cage size of B. This new excitation can be attributed to a local vibration of the R ion, which can be regarded as "rattler" in the cage of B.

AB - In Raman scattering spectra of RB6, anomalous peaks have been found below 200 cm-1 for the R+3B6, except for phonons and CEF excitations. Their peak intensities decrease with decreasing temperature, and this temperature dependence correlates with that of the mean square displacement of R. Furthermore, their energies decrease with the increase of the cage size of B. This new excitation can be attributed to a local vibration of the R ion, which can be regarded as "rattler" in the cage of B.

KW - Raman scattering

KW - Rare earth hexaboride

KW - Rattling mode of rare-earth ion

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DO - 10.1016/S0921-4526(02)02513-9

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VL - 329-333

SP - 661

EP - 662

JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

SN - 0921-4526

IS - II

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