High vortex mobility in Hg-1201

D. Maurer, H. Breitzke, K. Lüders, M. Baenitz, D. A. Pavlov, E. V. Antipov

Результат исследований: Вклад в журналСтатьярецензирование

1 Цитирования (Scopus)

Аннотация

We report on detailed investigations of the mixed state in the mercury based high-Tc superconductor HgBa2CuO4 (Hg-1201) by means of ac and dc magnetization measurements. Over large parts of the superconducting phase diagram the vortex mobility turned out to be remarkably high. From knowledge of the phase boundaries and the irreversibility line also determined, it became clear that in Hg-1201 thermal activation strongly supports the flux diffusion in both liquid and solid vortex phases. Thermally assisted flux diffusion widely stops here only for temperatures well below the melting line. In particular, the strong decrease of vortex mobility within the solid phase suggests a transition between different regimes originating from a different nature of vortex pinning, i.e. collective or single, and indicates a weak to strong pinning crossover of vortex matter in pure Hg-1201. A phenomenological description of the flux dynamics based on the classic diffusion formalism has been performed.

Язык оригиналаАнглийский
Номер статьи150
Страницы (с-по)613-617
Число страниц5
ЖурналJournal of Physics: Conference Series
Том43
Номер выпуска1
DOI
СостояниеОпубликовано - 1 июн. 2006
Опубликовано для внешнего пользованияДа

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