Raman Scattering Investigation of Y2BaNiO5

Norio Ogita; Yasuhiro Tsunezumi; Tetsuya Yokoo; Jun Akimitsu; Masayuki Udagawa

doi:10.1143/JPSJ.66.873

Raman Scattering Investigation of Y₂BaNiO₅

Norio Ogita, Yasuhiro Tsunezumi, Tetsuya Yokoo, Jun Akimitsu, Masayuki Udagawa

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

3 Citations (Scopus)

Abstract

Raman scattering spectra of Y₂BaNiO₅ have been measured in the temperature region between 7 K and 530 K, and also an infrared absorption spectrum has been measured at room temperature. We have observed the A_g phonon modes at 244 and 532 cm^-1, B_2g at 171 and 322 cm^-1, and B_3g at 178, 257 and 435 cm^-1, respectively. For only (a, a) spectrum among the A_g spectra, a strong doublet peak at about 760 cm^-1 and a weak triplet peak at about 1500 cm^-1 have been found. With the increase of temperature, the doublet peak becomes single peak and the triplet peak almost disappears in the higher temperature region than 400 K, where magnetic susceptibility shows the maximum. This suggests that these peaks can be related to the magnetic excitations.

Original language	English
Pages (from-to)	873-876
Number of pages	4
Journal	journal of the physical society of japan
Volume	66
Issue number	3
DOIs	https://doi.org/10.1143/JPSJ.66.873
Publication status	Published - Mar 1997
Externally published	Yes

Keywords

Haldane material magnetic excitation
Phonon
Raman scattering
YBaNiO

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1143/JPSJ.66.873

Cite this

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title = "Raman Scattering Investigation of Y2BaNiO5",

abstract = "Raman scattering spectra of Y2BaNiO5 have been measured in the temperature region between 7 K and 530 K, and also an infrared absorption spectrum has been measured at room temperature. We have observed the Ag phonon modes at 244 and 532 cm-1, B2g at 171 and 322 cm-1, and B3g at 178, 257 and 435 cm-1, respectively. For only (a, a) spectrum among the Ag spectra, a strong doublet peak at about 760 cm-1 and a weak triplet peak at about 1500 cm-1 have been found. With the increase of temperature, the doublet peak becomes single peak and the triplet peak almost disappears in the higher temperature region than 400 K, where magnetic susceptibility shows the maximum. This suggests that these peaks can be related to the magnetic excitations.",

keywords = "Haldane material magnetic excitation, Phonon, Raman scattering, YBaNiO",

author = "Norio Ogita and Yasuhiro Tsunezumi and Tetsuya Yokoo and Jun Akimitsu and Masayuki Udagawa",

year = "1997",

month = mar,

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language = "English",

volume = "66",

pages = "873--876",

journal = "journal of the physical society of japan",

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publisher = "Physical Society of Japan",

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}

TY - JOUR

T1 - Raman Scattering Investigation of Y2BaNiO5

AU - Ogita, Norio

AU - Tsunezumi, Yasuhiro

AU - Yokoo, Tetsuya

AU - Akimitsu, Jun

AU - Udagawa, Masayuki

PY - 1997/3

Y1 - 1997/3

N2 - Raman scattering spectra of Y2BaNiO5 have been measured in the temperature region between 7 K and 530 K, and also an infrared absorption spectrum has been measured at room temperature. We have observed the Ag phonon modes at 244 and 532 cm-1, B2g at 171 and 322 cm-1, and B3g at 178, 257 and 435 cm-1, respectively. For only (a, a) spectrum among the Ag spectra, a strong doublet peak at about 760 cm-1 and a weak triplet peak at about 1500 cm-1 have been found. With the increase of temperature, the doublet peak becomes single peak and the triplet peak almost disappears in the higher temperature region than 400 K, where magnetic susceptibility shows the maximum. This suggests that these peaks can be related to the magnetic excitations.

AB - Raman scattering spectra of Y2BaNiO5 have been measured in the temperature region between 7 K and 530 K, and also an infrared absorption spectrum has been measured at room temperature. We have observed the Ag phonon modes at 244 and 532 cm-1, B2g at 171 and 322 cm-1, and B3g at 178, 257 and 435 cm-1, respectively. For only (a, a) spectrum among the Ag spectra, a strong doublet peak at about 760 cm-1 and a weak triplet peak at about 1500 cm-1 have been found. With the increase of temperature, the doublet peak becomes single peak and the triplet peak almost disappears in the higher temperature region than 400 K, where magnetic susceptibility shows the maximum. This suggests that these peaks can be related to the magnetic excitations.

KW - Haldane material magnetic excitation

KW - Phonon

KW - Raman scattering

KW - YBaNiO

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