Raman spectroscopy on nonstoichiometric Gd123 thin films

T. Kakeshita, Kazuhide Hirose, S. Lee

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

We performed the Raman measurements to investigate the effect of cation nonstoichiometry on Gd123 thin films. The Gd123 thin films are grown by a conventional pulsed laser deposition (PLD) method with cation off-stoichiometric target samples. The films show different superconducting (SC) properties (Tc, Jc) from one another. The Ba-poor composition shows the best SC properties, while the Ba-rich composition shows the worst properties. The Raman spectra also depend on the compositions. All the spectra exhibit the five phonon peaks peculiar to 123-structure, however, some show also other peaks which result from oxygen deficiency in the chain structure, or also other origins. We discuss that the SC properties are strongly affected by the disorders of Ba and chain sites due to the cation nonstoichiometry through the Raman spectra.

Original languageEnglish
Pages (from-to)96-99
Number of pages4
JournalPhysica C: Superconductivity and its Applications
Volume463-465
Issue numberSUPPL.
DOIs
Publication statusPublished - 2007 Oct 1

Fingerprint

Raman spectroscopy
Cations
Positive ions
Thin films
Raman scattering
thin films
Chemical analysis
cations
Raman spectra
Pulsed laser deposition
hypoxia
Oxygen
pulsed laser deposition
disorders

Keywords

  • Gd123
  • Nonstoichiometry
  • Phonon
  • Raman

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Raman spectroscopy on nonstoichiometric Gd123 thin films. / Kakeshita, T.; Hirose, Kazuhide; Lee, S.

In: Physica C: Superconductivity and its Applications, Vol. 463-465, No. SUPPL., 01.10.2007, p. 96-99.

Research output: Contribution to journalArticle

@article{9a80289fa2de4f9ca66a39c34aff1ffb,
title = "Raman spectroscopy on nonstoichiometric Gd123 thin films",
abstract = "We performed the Raman measurements to investigate the effect of cation nonstoichiometry on Gd123 thin films. The Gd123 thin films are grown by a conventional pulsed laser deposition (PLD) method with cation off-stoichiometric target samples. The films show different superconducting (SC) properties (Tc, Jc) from one another. The Ba-poor composition shows the best SC properties, while the Ba-rich composition shows the worst properties. The Raman spectra also depend on the compositions. All the spectra exhibit the five phonon peaks peculiar to 123-structure, however, some show also other peaks which result from oxygen deficiency in the chain structure, or also other origins. We discuss that the SC properties are strongly affected by the disorders of Ba and chain sites due to the cation nonstoichiometry through the Raman spectra.",
keywords = "Gd123, Nonstoichiometry, Phonon, Raman",
author = "T. Kakeshita and Kazuhide Hirose and S. Lee",
year = "2007",
month = "10",
day = "1",
doi = "10.1016/j.physc.2007.05.011",
language = "English",
volume = "463-465",
pages = "96--99",
journal = "Physica C: Superconductivity and its Applications",
issn = "0921-4534",
publisher = "Elsevier",
number = "SUPPL.",

}

TY - JOUR

T1 - Raman spectroscopy on nonstoichiometric Gd123 thin films

AU - Kakeshita, T.

AU - Hirose, Kazuhide

AU - Lee, S.

PY - 2007/10/1

Y1 - 2007/10/1

N2 - We performed the Raman measurements to investigate the effect of cation nonstoichiometry on Gd123 thin films. The Gd123 thin films are grown by a conventional pulsed laser deposition (PLD) method with cation off-stoichiometric target samples. The films show different superconducting (SC) properties (Tc, Jc) from one another. The Ba-poor composition shows the best SC properties, while the Ba-rich composition shows the worst properties. The Raman spectra also depend on the compositions. All the spectra exhibit the five phonon peaks peculiar to 123-structure, however, some show also other peaks which result from oxygen deficiency in the chain structure, or also other origins. We discuss that the SC properties are strongly affected by the disorders of Ba and chain sites due to the cation nonstoichiometry through the Raman spectra.

AB - We performed the Raman measurements to investigate the effect of cation nonstoichiometry on Gd123 thin films. The Gd123 thin films are grown by a conventional pulsed laser deposition (PLD) method with cation off-stoichiometric target samples. The films show different superconducting (SC) properties (Tc, Jc) from one another. The Ba-poor composition shows the best SC properties, while the Ba-rich composition shows the worst properties. The Raman spectra also depend on the compositions. All the spectra exhibit the five phonon peaks peculiar to 123-structure, however, some show also other peaks which result from oxygen deficiency in the chain structure, or also other origins. We discuss that the SC properties are strongly affected by the disorders of Ba and chain sites due to the cation nonstoichiometry through the Raman spectra.

KW - Gd123

KW - Nonstoichiometry

KW - Phonon

KW - Raman

UR - http://www.scopus.com/inward/record.url?scp=34548429730&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=34548429730&partnerID=8YFLogxK

U2 - 10.1016/j.physc.2007.05.011

DO - 10.1016/j.physc.2007.05.011

M3 - Article

VL - 463-465

SP - 96

EP - 99

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

SN - 0921-4534

IS - SUPPL.

ER -