Infrared absorption of Nd2-xCexCuO4 and R2CuO4 (R=Pr, Nd, Sm, and Gd)

Masayuki Udagawa, Yoshinori Nagaoka, Tatefumi Johkou, Norio Ogita, Miki Masada, Jun Akimitsu, Kohji Ohbayashi

Research output: Contribution to journalArticle

Abstract

Infrared absorption spectra of Nd2-xCexCuO4 and R2CuO4 (R=Pr, Nd, Sm, and Gd) have been measured in the energy region between 250 and 800cm-1 at room temperature. For Nd2-xCexCuO4, it is found that the mode at about 350cm-1, which is the vibration of oxygen in the R-O layers along the a-axis, disappears both for the as-grown Nd2-xCexCuO4 of x≥0.08 and for the oxygen-reduced Nd2-xCexCuO4 of x≥0, and the disapperrance is correlated to the resistivity. For R2CuO4, it is found that the energy of the A2u symmetry mode, which is the oxygen vibration along the c-axis, increases by about 50cm-1 between Pr to Gd, and this fact suggests that the three dimennsional character increases in a sequence of Pr, Nd, Sm, and Gd.

Original languageEnglish
Pages (from-to)433-434
Number of pages2
JournalPhysica B: Condensed Matter
Volume194-196
Issue numberPART 1
DOIs
Publication statusPublished - Feb 2 1994
Externally publishedYes

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Infrared absorption
infrared absorption
Oxygen
oxygen
vibration
Absorption spectra
infrared spectra
absorption spectra
electrical resistivity
energy
symmetry
room temperature
Temperature

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Udagawa, M., Nagaoka, Y., Johkou, T., Ogita, N., Masada, M., Akimitsu, J., & Ohbayashi, K. (1994). Infrared absorption of Nd2-xCexCuO4 and R2CuO4 (R=Pr, Nd, Sm, and Gd). Physica B: Condensed Matter, 194-196(PART 1), 433-434. https://doi.org/10.1016/0921-4526(94)90546-0

Infrared absorption of Nd2-xCexCuO4 and R2CuO4 (R=Pr, Nd, Sm, and Gd). / Udagawa, Masayuki; Nagaoka, Yoshinori; Johkou, Tatefumi; Ogita, Norio; Masada, Miki; Akimitsu, Jun; Ohbayashi, Kohji.

In: Physica B: Condensed Matter, Vol. 194-196, No. PART 1, 02.02.1994, p. 433-434.

Research output: Contribution to journalArticle

Udagawa, M, Nagaoka, Y, Johkou, T, Ogita, N, Masada, M, Akimitsu, J & Ohbayashi, K 1994, 'Infrared absorption of Nd2-xCexCuO4 and R2CuO4 (R=Pr, Nd, Sm, and Gd)', Physica B: Condensed Matter, vol. 194-196, no. PART 1, pp. 433-434. https://doi.org/10.1016/0921-4526(94)90546-0
Udagawa, Masayuki ; Nagaoka, Yoshinori ; Johkou, Tatefumi ; Ogita, Norio ; Masada, Miki ; Akimitsu, Jun ; Ohbayashi, Kohji. / Infrared absorption of Nd2-xCexCuO4 and R2CuO4 (R=Pr, Nd, Sm, and Gd). In: Physica B: Condensed Matter. 1994 ; Vol. 194-196, No. PART 1. pp. 433-434.
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