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- W4286001963 abstract "Abstract We report systematic field-cooled (FC) magnetisation of superconducting (V 0.6 Ti 0.4 )–Y alloys in the presence of applied magnetic fields up to 7 T. A paramagnetic response is clearly observed just below the superconducting transition temperature ( <?CDATA $T_mathrm{c}$?> <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML overflow=scroll> <mml:msub> <mml:mi>T</mml:mi> <mml:mrow> <mml:mi mathvariant=normal>c</mml:mi> </mml:mrow> </mml:msub> </mml:math> ) in low fields ( <?CDATA ${leqslant}0.2$?> <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML overflow=scroll> <mml:mrow> <mml:mo>⩽</mml:mo> <mml:mn>0.2</mml:mn> </mml:mrow> </mml:math> T). The lower <?CDATA $T_mathrm{c}$?> <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML overflow=scroll> <mml:msub> <mml:mi>T</mml:mi> <mml:mrow> <mml:mi mathvariant=normal>c</mml:mi> </mml:mrow> </mml:msub> </mml:math> of the Y-rich precipitates, when compared to the bulk, is the origin of flux compression that leads to this paramagnetic response in low fields. It is also observed that the magnetisation obtained during the FC cooling cycle is lower than that of FC warming for the (V 0.6 Ti 0.4 )–Y alloys in fields higher than 0.02 T. Moreover, paramagnetic relaxation of the FC moment is also observed in this system. We infer that these features of the Y-containing alloys are related to the high-field paramagnetic Meissner effect (HFPME). Our analysis shows that the large difference in pinning strength of the different pinning centres, generated due to Y addition in the V 0.6 Ti 0.4 alloys, is responsible for the HFPME. We find additional evidence of our claim in the form of an extension of the range of the temperature and magnetic fields over which the HFPME is observed, when the samples are subjected to cold work. The observation of the HFPME up to 7 T has not been reported until now in any low <?CDATA $T_mathrm{c}$?> <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML overflow=scroll> <mml:msub> <mml:mi>T</mml:mi> <mml:mrow> <mml:mi mathvariant=normal>c</mml:mi> </mml:mrow> </mml:msub> </mml:math> superconductor, and only a very few high <?CDATA $T_mathrm{c}$?> <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML overflow=scroll> <mml:msub> <mml:mi>T</mml:mi> <mml:mrow> <mml:mi mathvariant=normal>c</mml:mi> </mml:mrow> </mml:msub> </mml:math> superconductors show the HFPME upto such high fields." @default.
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- W4286001963 date "2022-08-30" @default.
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- W4286001963 title "Strong paramagnetic response in the superconducting state of Y-containing V<sub>0.6</sub>Ti<sub>0.4</sub> alloys" @default.
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