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

doi:10.1016/S0921-4534(02)01436-3

Harmonic susceptibilities of polycrystalline (La_1-xCa_x)(Ba_1.75-xLa_0.25+x)Cu₃O_7+d synthesized by amorphous metal-complex method

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

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

Single-phase tetragonal (La_1-xCa_x)(Ba_1.75-xLa_0.25+x)Cu₃O_7+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 χ_n = χ_n^′-iχ_n″ (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 χ_n for all n in the temperature range of the superconducting transition. The observed χ_n-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 language	English
Pages (from-to)	324-328
Number of pages	5
Journal	Physica C: Superconductivity and its Applications
Volume	378-381
Issue number	PART 1
DOIs	https://doi.org/10.1016/S0921-4534(02)01436-3
Publication status	Published - 2002 Oct 1
Externally published	Yes

Keywords

Ca substitution
Harmonic susceptibilities
La-based cuprates
Pinning force

ASJC Scopus subject areas

Condensed Matter Physics

Access to Document

10.1016/S0921-4534(02)01436-3

Cite this

@article{0cb85b820c9a440c9d8a062c718e63e9,

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

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.",

keywords = "Ca substitution, Harmonic susceptibilities, La-based cuprates, Pinning force",

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

year = "2002",

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doi = "10.1016/S0921-4534(02)01436-3",

language = "English",

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pages = "324--328",

journal = "Physica C: Superconductivity and its Applications",

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T1 - Harmonic susceptibilities of polycrystalline (La1-xCax)(Ba1.75-xLa0.25+x)Cu3 O7+d synthesized by amorphous metal-complex method

AU - Yamaguchi, A.

AU - Yasuoka, H.

AU - Tanaka, Y.

AU - Katsumata, T.

AU - Sato, Y.

AU - Petrykin, V.

AU - Osada, M.

AU - Kakihana, M.

PY - 2002/10/1

Y1 - 2002/10/1

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.

KW - Ca substitution

KW - Harmonic susceptibilities

KW - La-based cuprates

KW - Pinning force

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