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

doi:10.1016/0921-4526(94)90546-0

Infrared absorption of Nd_2-xCe_xCuO₄ 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 journal › Article › peer-review

Abstract

Infrared absorption spectra of Nd_2-xCe_xCuO₄ and R₂CuO₄ (R=Pr, Nd, Sm, and Gd) have been measured in the energy region between 250 and 800cm^-1 at room temperature. For Nd_2-xCe_xCuO₄, 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 Nd_2-xCe_xCuO₄ of x≥0.08 and for the oxygen-reduced Nd_2-xCe_xCuO₄ of x≥0, and the disapperrance is correlated to the resistivity. For R₂CuO₄, it is found that the energy of the A_2u 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 language	English
Pages (from-to)	433-434
Number of pages	2
Journal	Physica B: Physics of Condensed Matter
Volume	194-196
Issue number	PART 1
DOIs	https://doi.org/10.1016/0921-4526(94)90546-0
Publication status	Published - Feb 2 1994
Externally published	Yes

ASJC Scopus subject areas

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

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

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.",

author = "Masayuki Udagawa and Yoshinori Nagaoka and Tatefumi Johkou and Norio Ogita and Miki Masada and Jun Akimitsu and Kohji Ohbayashi",

year = "1994",

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doi = "10.1016/0921-4526(94)90546-0",

language = "English",

volume = "194-196",

pages = "433--434",

journal = "Physica B: Condensed Matter",

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T1 - Infrared absorption of Nd2-xCexCuO4 and R2CuO4 (R=Pr, Nd, Sm, and Gd)

AU - Udagawa, Masayuki

AU - Nagaoka, Yoshinori

AU - Johkou, Tatefumi

AU - Ogita, Norio

AU - Masada, Miki

AU - Akimitsu, Jun

AU - Ohbayashi, Kohji

PY - 1994/2/2

Y1 - 1994/2/2

N2 - 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.

AB - 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.

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IS - PART 1

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Infrared absorption of Nd_2-xCe_xCuO₄ and R₂CuO₄ (R=Pr, Nd, Sm, and Gd)

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