Raman and infrared spectroscopy of YBa 2 Cu 3 O 7-δ -BaPbO 3 composites

Ji Yeon Kim, Su Young Lee, In Sang Yang, T. G. Lee, S. S. Yom, Kibum Kim, Jae Hoon Kim

Research output: Contribution to journalArticle

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Abstract

We present results of Raman and infrared spectroscopic studies of the composite system of superconducting YBa 2 Cu 3 O 7-δ and metallic BaPbO 3 , with the BaPbO 3 fraction ranging from 5 to 30 in weight. The Raman spectra of the YBa 2 Cu 3 O 7-δ grains in the composite system are typical of well-oxygenated YBa 2 Cu 3 O 7-δ bulk single crystals, even up to the grain boundaries, independent of the BaPbO 3 fraction. We have also performed infrared reflectivity measurements and have identified the major c-axis transverse-optical phonons of YBa 2 Cu 3 O 7-δ , consistent with the single-crystal data, confirming that the constituent YBa 2 Cu 3 O 7-δ crystallites are fully oxygenated. The absence of mode splitting suggests that the crystal symmetry of YBa 2 Cu 3 O 7-δ grains remains the same as that of bulk single crystals. No phonons indicative of other YBa 2 Cu 3 O 7 - or BaPbO 3 -related impurity phases, such as YBa 2 Cu 3 O 6 , Y 2 BaCuO 5 , and Ba 2 PbO 4 , have been detected in our Raman and infrared spectra. All these optical features clearly indicate that YBa 2 Cu 3 O 7-δ is well separated from BaPbO 3 and that BaPbO 3 is an excellent additive material for the synthesis of YBa 2 Cu 3 O 7-δ bulk materials.

Original languageEnglish
Pages (from-to)60-66
Number of pages7
JournalPhysica C: Superconductivity and its applications
Volume308
Issue number1-2
DOIs
Publication statusPublished - 1998 Nov 1

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Raman spectroscopy
Infrared spectroscopy
infrared spectroscopy
Single crystals
Phonons
Infrared radiation
composite materials
Large scale systems
single crystals
Composite materials
phonons
Raman spectra
Crystal symmetry
Crystallites
crystallites
Raman scattering
Grain boundaries
infrared spectra
grain boundaries
Impurities

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

Cite this

Kim, Ji Yeon ; Lee, Su Young ; Yang, In Sang ; Lee, T. G. ; Yom, S. S. ; Kim, Kibum ; Kim, Jae Hoon. / Raman and infrared spectroscopy of YBa 2 Cu 3 O 7-δ -BaPbO 3 composites In: Physica C: Superconductivity and its applications. 1998 ; Vol. 308, No. 1-2. pp. 60-66.
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Raman and infrared spectroscopy of YBa 2 Cu 3 O 7-δ -BaPbO 3 composites . / Kim, Ji Yeon; Lee, Su Young; Yang, In Sang; Lee, T. G.; Yom, S. S.; Kim, Kibum; Kim, Jae Hoon.

In: Physica C: Superconductivity and its applications, Vol. 308, No. 1-2, 01.11.1998, p. 60-66.

Research output: Contribution to journalArticle

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T1 - Raman and infrared spectroscopy of YBa 2 Cu 3 O 7-δ -BaPbO 3 composites

AU - Kim, Ji Yeon

AU - Lee, Su Young

AU - Yang, In Sang

AU - Lee, T. G.

AU - Yom, S. S.

AU - Kim, Kibum

AU - Kim, Jae Hoon

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N2 - We present results of Raman and infrared spectroscopic studies of the composite system of superconducting YBa 2 Cu 3 O 7-δ and metallic BaPbO 3 , with the BaPbO 3 fraction ranging from 5 to 30 in weight. The Raman spectra of the YBa 2 Cu 3 O 7-δ grains in the composite system are typical of well-oxygenated YBa 2 Cu 3 O 7-δ bulk single crystals, even up to the grain boundaries, independent of the BaPbO 3 fraction. We have also performed infrared reflectivity measurements and have identified the major c-axis transverse-optical phonons of YBa 2 Cu 3 O 7-δ , consistent with the single-crystal data, confirming that the constituent YBa 2 Cu 3 O 7-δ crystallites are fully oxygenated. The absence of mode splitting suggests that the crystal symmetry of YBa 2 Cu 3 O 7-δ grains remains the same as that of bulk single crystals. No phonons indicative of other YBa 2 Cu 3 O 7 - or BaPbO 3 -related impurity phases, such as YBa 2 Cu 3 O 6 , Y 2 BaCuO 5 , and Ba 2 PbO 4 , have been detected in our Raman and infrared spectra. All these optical features clearly indicate that YBa 2 Cu 3 O 7-δ is well separated from BaPbO 3 and that BaPbO 3 is an excellent additive material for the synthesis of YBa 2 Cu 3 O 7-δ bulk materials.

AB - We present results of Raman and infrared spectroscopic studies of the composite system of superconducting YBa 2 Cu 3 O 7-δ and metallic BaPbO 3 , with the BaPbO 3 fraction ranging from 5 to 30 in weight. The Raman spectra of the YBa 2 Cu 3 O 7-δ grains in the composite system are typical of well-oxygenated YBa 2 Cu 3 O 7-δ bulk single crystals, even up to the grain boundaries, independent of the BaPbO 3 fraction. We have also performed infrared reflectivity measurements and have identified the major c-axis transverse-optical phonons of YBa 2 Cu 3 O 7-δ , consistent with the single-crystal data, confirming that the constituent YBa 2 Cu 3 O 7-δ crystallites are fully oxygenated. The absence of mode splitting suggests that the crystal symmetry of YBa 2 Cu 3 O 7-δ grains remains the same as that of bulk single crystals. No phonons indicative of other YBa 2 Cu 3 O 7 - or BaPbO 3 -related impurity phases, such as YBa 2 Cu 3 O 6 , Y 2 BaCuO 5 , and Ba 2 PbO 4 , have been detected in our Raman and infrared spectra. All these optical features clearly indicate that YBa 2 Cu 3 O 7-δ is well separated from BaPbO 3 and that BaPbO 3 is an excellent additive material for the synthesis of YBa 2 Cu 3 O 7-δ bulk materials.

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