Peak effect with tilted fields in melt-processed (Sm, Eu, Gd)Ba2Cu3O7-δ superconductors

A. Hu, H. Zhou, N. Chikumoto, Naomichi Sakai, I. Hirabayashi, Masato Murakami

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The peak effect in melt-processed (Sm, Eu, Gd)Ba2Cu3O7-δ crystals was investigated by rotating the angle θ, between applied fields, Ba, and the a-b plane. For Ba ∥ c, the scaling of the pinning force over a wide temperature range showed that the predominant pinning is δTc style pinning. A linear temperature dependence of the peak field, Bp, at which the magnetic moment showed a secondary peak was observed in the magnetic phase diagram. At 85 K, Bp shifted to a higher field, associated with a systematic decrease of the peak amplitude with θ reaching zero. For Ba ∥ ab, the peak effect displayed the highest peak field and the minimum peak height. An ordering compositional fluctuation was observed both in- and out-of-plane by transmission electron microscopy. Such a 3D distribution of chemical variation could account for the angular dependence of the peak effect.

Original languageEnglish
JournalSuperconductor Science and Technology
Volume17
Issue number2
DOIs
Publication statusPublished - 2004 Feb

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Superconducting materials
Magnetic moments
Phase diagrams
Transmission electron microscopy
Temperature
Crystals
magnetic moments
phase diagrams
scaling
temperature dependence
transmission electron microscopy
crystals

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)
  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Peak effect with tilted fields in melt-processed (Sm, Eu, Gd)Ba2Cu3O7-δ superconductors. / Hu, A.; Zhou, H.; Chikumoto, N.; Sakai, Naomichi; Hirabayashi, I.; Murakami, Masato.

In: Superconductor Science and Technology, Vol. 17, No. 2, 02.2004.

Research output: Contribution to journalArticle

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AU - Hirabayashi, I.

AU - Murakami, Masato

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