Field-cooled magnetization of YBa2Cu3O7-δ superconductors

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Abstract

DC susceptibility as a function of temperature was measured in both field-cooled cooling and warming modes in magnetic fields in the range of 10 mT≤μ0Ha≤7 T on a variety of YBa2Cu3O7-δ samples, comprising different single crystals, melt-processed bulks and polycrystalline samples, with and without KClO3 addition. The Meissner curves measured at a field of 1 mT reveal that all the samples are of a single phase. However, with increasing applied fields, the superconducting transitions of the single crystals and the melt-processed samples develop kinks, and above 4 T, even a secondary transition can be observed. At low temperatures, the field-cooled moment increases in all samples, except the KClO3-doped samples, where a clear decrease is observed. These features are discussed in detail. Further, we discuss the correlation between the kinks in the DC susceptibility and the appearance of the fishtail shape of magnetization hysteresis loops.

Original languageEnglish
Pages (from-to)235-242
Number of pages8
JournalPhysica C: Superconductivity and its Applications
Volume340
Issue number2-3
DOIs
Publication statusPublished - 2000 Dec 1
Externally publishedYes

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Superconducting materials
Magnetization
Single crystals
magnetization
Hysteresis loops
Magnetic fields
Cooling
Temperature
direct current
magnetic permeability
single crystals
barium copper yttrium oxide
hysteresis
moments
cooling
heating
curves
magnetic fields
Cool-X-A
temperature

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

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title = "Field-cooled magnetization of YBa2Cu3O7-δ superconductors",
abstract = "DC susceptibility as a function of temperature was measured in both field-cooled cooling and warming modes in magnetic fields in the range of 10 mT≤μ0Ha≤7 T on a variety of YBa2Cu3O7-δ samples, comprising different single crystals, melt-processed bulks and polycrystalline samples, with and without KClO3 addition. The Meissner curves measured at a field of 1 mT reveal that all the samples are of a single phase. However, with increasing applied fields, the superconducting transitions of the single crystals and the melt-processed samples develop kinks, and above 4 T, even a secondary transition can be observed. At low temperatures, the field-cooled moment increases in all samples, except the KClO3-doped samples, where a clear decrease is observed. These features are discussed in detail. Further, we discuss the correlation between the kinks in the DC susceptibility and the appearance of the fishtail shape of magnetization hysteresis loops.",
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AU - Koblischka, Michael Rudolf

AU - Koblischka-Veneva, Anjela Dimitrova

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PY - 2000/12/1

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N2 - DC susceptibility as a function of temperature was measured in both field-cooled cooling and warming modes in magnetic fields in the range of 10 mT≤μ0Ha≤7 T on a variety of YBa2Cu3O7-δ samples, comprising different single crystals, melt-processed bulks and polycrystalline samples, with and without KClO3 addition. The Meissner curves measured at a field of 1 mT reveal that all the samples are of a single phase. However, with increasing applied fields, the superconducting transitions of the single crystals and the melt-processed samples develop kinks, and above 4 T, even a secondary transition can be observed. At low temperatures, the field-cooled moment increases in all samples, except the KClO3-doped samples, where a clear decrease is observed. These features are discussed in detail. Further, we discuss the correlation between the kinks in the DC susceptibility and the appearance of the fishtail shape of magnetization hysteresis loops.

AB - DC susceptibility as a function of temperature was measured in both field-cooled cooling and warming modes in magnetic fields in the range of 10 mT≤μ0Ha≤7 T on a variety of YBa2Cu3O7-δ samples, comprising different single crystals, melt-processed bulks and polycrystalline samples, with and without KClO3 addition. The Meissner curves measured at a field of 1 mT reveal that all the samples are of a single phase. However, with increasing applied fields, the superconducting transitions of the single crystals and the melt-processed samples develop kinks, and above 4 T, even a secondary transition can be observed. At low temperatures, the field-cooled moment increases in all samples, except the KClO3-doped samples, where a clear decrease is observed. These features are discussed in detail. Further, we discuss the correlation between the kinks in the DC susceptibility and the appearance of the fishtail shape of magnetization hysteresis loops.

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