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- W195657293 abstract "We report on systematic field-cooled magnetization experiments in five different melt-textured $mathrm{Y}{mathrm{Ba}}_{2}{mathrm{Cu}}_{3}{mathrm{O}}_{7}$ samples containing large amounts of ${mathrm{Y}}_{2}mathrm{Ba}mathrm{Cu}{mathrm{O}}_{5}$ precipitates. These composites were grown with the Bridgman or top-seeding techniques. Fields ranging from $1phantom{rule{0.3em}{0ex}}mathrm{Oe}$ up to $50phantom{rule{0.3em}{0ex}}mathrm{kOe}$ were applied either parallel or perpendicular to the $mathrm{Cu}ensuremath{-}{mathrm{O}}_{2}$ atomic planes. In the low field limit, we observed the paramagnetic Meissner effect (PME) in a Bridgman grown sample for the configuration where the field is oriented parallel to the $mathrm{Cu}ensuremath{-}{mathrm{O}}_{2}$ atomic planes. Contrasting with this unique observation at low fields, a paramagnetic response related to the superconducting state was observed in all of the studied samples when strong enough fields were applied in both orientations. This high-field paramagnetic effect shows some noticeable differences when compared to the most frequently reported PME at very low fields. In particular, the magnitude of the high-field paramagnetic moment increases when the field is augmented. Moreover, this effect shows a strong and anomalous relaxation, such that the paramagnetic moment increases as a function of the time. The anisotropy of the high-field paramagnetic moment depends on the sample microstructure, suggesting that pinning by the ${mathrm{Y}}_{2}mathrm{Ba}mathrm{Cu}{mathrm{O}}_{5}$ particles plays a crucial role in the explanation of this effect in the melt-processed $mathrm{Y}{mathrm{Ba}}_{2}{mathrm{Cu}}_{3}{mathrm{O}}_{7}$ materials." @default.
- W195657293 created "2016-06-24" @default.
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- W195657293 date "2004-12-21" @default.
- W195657293 modified "2023-10-06" @default.
- W195657293 title "Paramagnetic effect at low and high magnetic fields in melt-textured<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:mi mathvariant=normal>Y</mml:mi><mml:msub><mml:mi mathvariant=normal>Ba</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi mathvariant=normal>Cu</mml:mi><mml:mn>3</mml:mn></mml:msub><mml:msub><mml:mi mathvariant=normal>O</mml:mi><mml:mrow><mml:mn>7</mml:mn><mml:mo>−</mml:mo><mml:mi>δ</mml:mi></mml:mrow></mml:msub></mml:mrow></…" @default.
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- W195657293 doi "https://doi.org/10.1103/physrevb.70.224519" @default.
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