Vortex matter phase diagram of untwinned YBa2Cu3Oy single crystals with different oxygen content

Kenji Shibata, Terukazu Nishizaki, Takahiko Sasaki, Norio Kobayashi

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

Resistivity, current-voltage characteristic and magnetization are measured on optimally doped and slightly underdoped untwinned YBa2Cu3Oy (YBCO) single crystals. Resistivity behaves quite differently from that of slightly overdoped ones and shows successive phase transitions; the first-order vortex liquid-liquid transition and the second-order vortex glass transition. The current-voltage characteristic on such a two-step transition shows S-like shape in extremely wide temperature range. Hysteresis curves of the magnetization also show the remarkable change depending on the different oxygen content. All these results suggest that the pinned liquid state such as the `vortex slush' regime exists on the vortex matter phase diagram for untwinned YBCO with the limited oxygen concentration.

Original languageEnglish
Pages (from-to)354-357
Number of pages4
JournalPhysica B: Condensed Matter
Volume294-295
DOIs
Publication statusPublished - 2001 Jan

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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