Magnetic properties of KClO3-doped Y(1-0.2x)Ba(2-0.2x)KxCu3Oy, (x = 0-0.40) HTSC

A. Koblischka-Veneva; M. R. Koblischka; K. Ogasawara; M. Murakami

doi:10.1088/0953-2048/13/6/337

Magnetic properties of KClO₃-doped Y_(1-0.2x)Ba_(2-0.2x)K_xCu₃O_y, (x = 0-0.40) HTSC

A. Koblischka-Veneva, M. R. Koblischka, K. Ogasawara, M. Murakami

Research output: Contribution to journal › Conference article

2 Citations (Scopus)

Abstract

The influence of KClO₃ addition on the magnetic properties and microstructural parameters (grain size, grain boundaries) of high-temperature superconductors (HTSC) with nominal composition Y_(1-0.2x)Ba_(2-0.2x)K_xCu₃O_y (x = 0-0.40) were investigated. The ac complex susceptibility χ_ac = χ′ - iχ″ was recorded as a function of temperature and concentration of KClO₃ at various ac magnetic fields up to 2 mT. The data were analysed using the relation h = a(1 - T_m/T_c)ⁿ, where T_m represents the intergranular peak temperature of the imaginary component χ″. The value of a is found to increase for doped samples, which suggests enhanced flux pinning due to the KClO₃ addition. The dc susceptibility as a function of temperature was measured by means of a SQUID magnetometer in field-cooled cooling (FCC) and field-cooled warming (FCW) modes in magnetic fields in the range 10 mT ≤ μ₀H_a ≤ 7 T on KClO₃-doped and pure YBCO samples. The Meissner curves reveal that the samples are single phase in all applied fields, but the low-temperature behaviour of the samples with KClO₃ additions is different from that of pure YBCO.

Original language	English
Pages (from-to)	807-810
Number of pages	4
Journal	Superconductor Science and Technology
Volume	13
Issue number	6
DOIs	https://doi.org/10.1088/0953-2048/13/6/337
Publication status	Published - 2000 Jun 1
Event	The 2nd International Workshop on the Processing and Applications of Superconducting (RE)CBO Large Grain Materials - Morioka, Jpn Duration: 1999 Oct 19 → 1999 Oct 22

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ASJC Scopus subject areas

Ceramics and Composites
Condensed Matter Physics
Metals and Alloys
Electrical and Electronic Engineering
Materials Chemistry

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Koblischka-Veneva, A., Koblischka, M. R., Ogasawara, K., & Murakami, M. (2000). Magnetic properties of KClO₃-doped Y_(1-0.2x)Ba_(2-0.2x)K_xCu₃O_y, (x = 0-0.40) HTSC. Superconductor Science and Technology, 13(6), 807-810. https://doi.org/10.1088/0953-2048/13/6/337

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abstract = "The influence of KClO3 addition on the magnetic properties and microstructural parameters (grain size, grain boundaries) of high-temperature superconductors (HTSC) with nominal composition Y(1-0.2x)Ba(2-0.2x)KxCu3Oy (x = 0-0.40) were investigated. The ac complex susceptibility χac = χ′ - iχ″ was recorded as a function of temperature and concentration of KClO3 at various ac magnetic fields up to 2 mT. The data were analysed using the relation h = a(1 - Tm/Tc)n, where Tm represents the intergranular peak temperature of the imaginary component χ″. The value of a is found to increase for doped samples, which suggests enhanced flux pinning due to the KClO3 addition. The dc susceptibility as a function of temperature was measured by means of a SQUID magnetometer in field-cooled cooling (FCC) and field-cooled warming (FCW) modes in magnetic fields in the range 10 mT ≤ μ0Ha ≤ 7 T on KClO3-doped and pure YBCO samples. The Meissner curves reveal that the samples are single phase in all applied fields, but the low-temperature behaviour of the samples with KClO3 additions is different from that of pure YBCO.",

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AU - Koblischka-Veneva, A.

AU - Koblischka, M. R.

AU - Ogasawara, K.

AU - Murakami, M.

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N2 - The influence of KClO3 addition on the magnetic properties and microstructural parameters (grain size, grain boundaries) of high-temperature superconductors (HTSC) with nominal composition Y(1-0.2x)Ba(2-0.2x)KxCu3Oy (x = 0-0.40) were investigated. The ac complex susceptibility χac = χ′ - iχ″ was recorded as a function of temperature and concentration of KClO3 at various ac magnetic fields up to 2 mT. The data were analysed using the relation h = a(1 - Tm/Tc)n, where Tm represents the intergranular peak temperature of the imaginary component χ″. The value of a is found to increase for doped samples, which suggests enhanced flux pinning due to the KClO3 addition. The dc susceptibility as a function of temperature was measured by means of a SQUID magnetometer in field-cooled cooling (FCC) and field-cooled warming (FCW) modes in magnetic fields in the range 10 mT ≤ μ0Ha ≤ 7 T on KClO3-doped and pure YBCO samples. The Meissner curves reveal that the samples are single phase in all applied fields, but the low-temperature behaviour of the samples with KClO3 additions is different from that of pure YBCO.

AB - The influence of KClO3 addition on the magnetic properties and microstructural parameters (grain size, grain boundaries) of high-temperature superconductors (HTSC) with nominal composition Y(1-0.2x)Ba(2-0.2x)KxCu3Oy (x = 0-0.40) were investigated. The ac complex susceptibility χac = χ′ - iχ″ was recorded as a function of temperature and concentration of KClO3 at various ac magnetic fields up to 2 mT. The data were analysed using the relation h = a(1 - Tm/Tc)n, where Tm represents the intergranular peak temperature of the imaginary component χ″. The value of a is found to increase for doped samples, which suggests enhanced flux pinning due to the KClO3 addition. The dc susceptibility as a function of temperature was measured by means of a SQUID magnetometer in field-cooled cooling (FCC) and field-cooled warming (FCW) modes in magnetic fields in the range 10 mT ≤ μ0Ha ≤ 7 T on KClO3-doped and pure YBCO samples. The Meissner curves reveal that the samples are single phase in all applied fields, but the low-temperature behaviour of the samples with KClO3 additions is different from that of pure YBCO.

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10.1088/0953-2048/13/6/337