Harmonic susceptibilities of polycrystalline (La1-xCax)(Ba1.75-xLa0.25+x)Cu3 O7+d synthesized by amorphous metal-complex method

A. Yamaguchi, H. Yasuoka, Y. Tanaka, T. Katsumata, Y. Sato, V. Petrykin, M. Osada, M. Kakihana

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Single-phase tetragonal (La1-xCax)(Ba1.75-xLa0.25+x)Cu3 O7+d polycrystals with the composition range 0.1≤x≤1.0 were synthesized by the amorphous metal-complex method. The fundamental and the higher-harmonic complex susceptibilities χn = χn-iχn″ (n = 1, 2, 3, 5, and 7) were measured by means of Hartshorn bridge. The ac-magnetic field superimposed on the earth's field was applied to the specimen. We observed nonzero values of χn for all n in the temperature range of the superconducting transition. The observed χn-T curves were analyzed by the Kim-Anderson critical-state model. We found that the pinning force density increases up to x = 0.5 and decreases over x = 0.5 with increasing the Ca content x, and is proportional to two kinds of the power of the elemental pinning force.

Original languageEnglish
Pages (from-to)324-328
Number of pages5
JournalPhysica C: Superconductivity and its Applications
Volume378-381
Issue numberPART 1
DOIs
Publication statusPublished - 2002 Oct 1
Externally publishedYes

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Coordination Complexes
Polycrystals
Metal complexes
Earth (planet)
Magnetic fields
magnetic permeability
harmonics
polycrystals
Chemical analysis
metals
Temperature
curves
magnetic fields
temperature

Keywords

  • Ca substitution
  • Harmonic susceptibilities
  • La-based cuprates
  • Pinning force

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Harmonic susceptibilities of polycrystalline (La1-xCax)(Ba1.75-xLa0.25+x)Cu3 O7+d synthesized by amorphous metal-complex method. / Yamaguchi, A.; Yasuoka, H.; Tanaka, Y.; Katsumata, T.; Sato, Y.; Petrykin, V.; Osada, M.; Kakihana, M.

In: Physica C: Superconductivity and its Applications, Vol. 378-381, No. PART 1, 01.10.2002, p. 324-328.

Research output: Contribution to journalArticle

Yamaguchi, A. ; Yasuoka, H. ; Tanaka, Y. ; Katsumata, T. ; Sato, Y. ; Petrykin, V. ; Osada, M. ; Kakihana, M. / Harmonic susceptibilities of polycrystalline (La1-xCax)(Ba1.75-xLa0.25+x)Cu3 O7+d synthesized by amorphous metal-complex method. In: Physica C: Superconductivity and its Applications. 2002 ; Vol. 378-381, No. PART 1. pp. 324-328.
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AU - Yamaguchi, A.

AU - Yasuoka, H.

AU - Tanaka, Y.

AU - Katsumata, T.

AU - Sato, Y.

AU - Petrykin, V.

AU - Osada, M.

AU - Kakihana, M.

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N2 - Single-phase tetragonal (La1-xCax)(Ba1.75-xLa0.25+x)Cu3 O7+d polycrystals with the composition range 0.1≤x≤1.0 were synthesized by the amorphous metal-complex method. The fundamental and the higher-harmonic complex susceptibilities χn = χn′-iχn″ (n = 1, 2, 3, 5, and 7) were measured by means of Hartshorn bridge. The ac-magnetic field superimposed on the earth's field was applied to the specimen. We observed nonzero values of χn for all n in the temperature range of the superconducting transition. The observed χn-T curves were analyzed by the Kim-Anderson critical-state model. We found that the pinning force density increases up to x = 0.5 and decreases over x = 0.5 with increasing the Ca content x, and is proportional to two kinds of the power of the elemental pinning force.

AB - Single-phase tetragonal (La1-xCax)(Ba1.75-xLa0.25+x)Cu3 O7+d polycrystals with the composition range 0.1≤x≤1.0 were synthesized by the amorphous metal-complex method. The fundamental and the higher-harmonic complex susceptibilities χn = χn′-iχn″ (n = 1, 2, 3, 5, and 7) were measured by means of Hartshorn bridge. The ac-magnetic field superimposed on the earth's field was applied to the specimen. We observed nonzero values of χn for all n in the temperature range of the superconducting transition. The observed χn-T curves were analyzed by the Kim-Anderson critical-state model. We found that the pinning force density increases up to x = 0.5 and decreases over x = 0.5 with increasing the Ca content x, and is proportional to two kinds of the power of the elemental pinning force.

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KW - La-based cuprates

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