Detailed investigation of the superconducting transition of niobium disks exhibiting the paramagnetic Meissner effect

L. Půst, L. Wenger, M. Koblischka

研究成果: Article査読

44 被引用数 (Scopus)

抄録

The superconducting transition region in a Nb disk showing the paramagnetic Meissner effect (PME) has been investigated in detail. From the field-cooled magnetization behavior, two well-defined temperatures can be associated with the appearance of the PME: (Formula presented) indicates the characteristic temperature where the paramagnetic moment first appears and a lower temperature (Formula presented) defines the temperature where the positive moment no longer increases. During the subsequent warming, the paramagnetic moment begins to decrease at (Formula presented) and then vanishes at (Formula presented) with the magnitude of the magnetization change between these two temperatures being nearly the same as that during cooling. This indicates that the nature of the PME is reversible and not associated with flux motion. Furthermore, the appearance of this paramagnetic moment is even observable in fields as large as 0.2 T even though the magnetization does not remain positive to the lowest temperatures. Magnetic hysteresis loops in the temperature range between (Formula presented) and (Formula presented) also exhibit a distinct shape that is different from the archetypal shape of a bulk type-II superconductor. These behaviors are discussed in terms of the so-called “giant vortex state.”.

本文言語English
ページ(範囲)14191-14194
ページ数4
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
58
21
DOI
出版ステータスPublished - 1998
外部発表はい

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

フィンガープリント 「Detailed investigation of the superconducting transition of niobium disks exhibiting the paramagnetic Meissner effect」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル