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High-field paramagnetic effect in large crystals of YBa2Cu3O7-δ

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journal contribution
posted on 27.04.2006 by A.I. Rykov, S. Tajima, Feodor Kusmartsev
We observed the appearance of a paramagnetic moment in YBa2Cu3O7-δ single crystals after cooling in a strong field (3–7 T). It is found that the effect depends on the cooling rate and sample size, indicating that the paramagnetic moment can be induced by compression of the magnetic flux in the course of rapid cooling. After rapid cooling, the temperature dependence of the magnetization during the field-cooled warming process exhibits a very articulated negative dip between irreversibility temperature Tirr and Tc. The diamagnetic dip may result from escaping the compressed flux. Comparing the dip widths for a number of crystals with different irreversibility lines Hirr(T) we found that a remarkable ``fishtail'' effect appears in the temperature region below the dip. This suggests that the field-induced pinning observed by the fishtail effect is linked with the paramagnetic effect that appears after rapid cooling in the high field.

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  • Science

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  • Physics

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133988 bytes

Citation

RYKOV, TAJIMA and KUSMARTSEV, 1997. High-field paramagnetic effect in large crystals of YBa2Cu3O7-δ. Physical Review B, 55(13), pp. 8557–8563

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© American Physical Society

Publication date

1997

Notes

This article was published in the journal, Physical Review B [© American Physical Society]. It is also available at: http://link.aps.org/abstract/PRB/v55/p8557.

ISSN

0163-1829

Language

en

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