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

Kenji Shibata; Terukazu Nishizaki; Takahiko Sasaki; Norio Kobayashi

doi:10.1016/S0921-4526(00)00676-1

Vortex matter phase diagram of untwinned YBa₂Cu₃O_y single crystals with different oxygen content

Kenji Shibata, Terukazu Nishizaki, Takahiko Sasaki, Norio Kobayashi

Institute for Materials Research (IMR) (institute affiliation only)

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

Resistivity, current-voltage characteristic and magnetization are measured on optimally doped and slightly underdoped untwinned YBa₂Cu₃O_y (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 language	English
Pages (from-to)	354-357
Number of pages	4
Journal	Physica B: Condensed Matter
Volume	294-295
DOIs	https://doi.org/10.1016/S0921-4526(00)00676-1
Publication status	Published - 2001 Jan

ASJC Scopus subject areas

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

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10.1016/S0921-4526(00)00676-1

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title = "Vortex matter phase diagram of untwinned YBa2Cu3Oy single crystals with different oxygen content",

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.",

author = "Kenji Shibata and Terukazu Nishizaki and Takahiko Sasaki and Norio Kobayashi",

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T1 - Vortex matter phase diagram of untwinned YBa2Cu3Oy single crystals with different oxygen content

AU - Shibata, Kenji

AU - Nishizaki, Terukazu

AU - Sasaki, Takahiko

AU - Kobayashi, Norio

PY - 2001/1

Y1 - 2001/1

N2 - 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.

AB - 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.

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Vortex matter phase diagram of untwinned YBa₂Cu₃O_y single crystals with different oxygen content

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