Effect of nonsuperconducting secondary inclusions on the magnetization relaxation in melt-processed RBa2Cu3O7-δ (R = Nd and Yb) bulk superconductors at high temperatures

T. Mochida; N. Chikumoto; M. Murakami

Effect of nonsuperconducting secondary inclusions on the magnetization relaxation in melt-processed RBa₂Cu₃O_7-δ (R = Nd and Yb) bulk superconductors at high temperatures

T. Mochida, N. Chikumoto, M. Murakami

Research output: Contribution to journal › Article › peer-review

Abstract

We have studied the effect of nonsuperconducting inclusions on the magnetization relaxation in melt-processed RBa₂Cu₃O_7-δ (R=Nd and Yb) bulk superconductor in a high - temperature region (77≤T ≤90 K). It is found that nonsuperconducting inclusions are mainly effective in reducing the normalized relaxation rate S (≡ -d ln M/d ln t) at low fields [b_irr(≡ μ₀H_a/B_irr)≲0.1] and at high fields (b_irr≳0.4). A suppression in S is observed in an intermediate field region (0.1≲b_irr≲0.4) for the samples exhibiting secondary peak effect, suggesting a relation between the peak and the suppression.

Original language	English
Article number	064518
Pages (from-to)	645181-645187
Number of pages	7
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	64
Issue number	6
Publication status	Published - 2001 Aug 1
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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Effect of nonsuperconducting secondary inclusions on the magnetization relaxation in melt-processed RBa₂Cu₃O_7-δ (R = Nd and Yb) bulk superconductors at high temperatures. / Mochida, T.; Chikumoto, N.; Murakami, M.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 64, No. 6, 064518, 01.08.2001, p. 645181-645187.

Research output: Contribution to journal › Article › peer-review

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abstract = "We have studied the effect of nonsuperconducting inclusions on the magnetization relaxation in melt-processed RBa2Cu3O7-δ (R=Nd and Yb) bulk superconductor in a high - temperature region (77≤T ≤90 K). It is found that nonsuperconducting inclusions are mainly effective in reducing the normalized relaxation rate S (≡ -d ln M/d ln t) at low fields [birr(≡ μ0Ha/Birr)≲0.1] and at high fields (birr≳0.4). A suppression in S is observed in an intermediate field region (0.1≲birr≲0.4) for the samples exhibiting secondary peak effect, suggesting a relation between the peak and the suppression.",

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