New Type of Vortex Pinning Structure Effective at Very High Magnetic Fields

M. Muralidhar, N. Sakai, N. Chikumoto, M. Jirsa, T. Machi, M. Nishiyama, Y. Wu, M. Murakami

研究成果: Article査読

170 被引用数 (Scopus)

抄録

We report on a new type of correlated nanometer-scale pinning structure observed in a melt-processed [Formula presented] (NEG-123). It consists of [Formula presented]-rich clusters in the stoichiometric NEG-123 matrix forming a lamellar array with a period of a few nanometers. These lamellas appear within regular twins, thus representing their fine substructure—sometimes straight, sometimes wavy. This new material structure correlates well with the significant enhancement of pinning at high fields, represented by irreversibility field above 14 T at 77 K ([Formula presented]). We believe that the new pinning medium enables one to significantly broaden the limits for high-field applications.

本文言語English
ジャーナルPhysical Review Letters
89
23
DOI
出版ステータスPublished - 2002
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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