TY - JOUR
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
N1 - Copyright:
Copyright 2018 Elsevier B.V., All rights reserved.
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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U2 - 10.1016/S0921-4526(00)00676-1
DO - 10.1016/S0921-4526(00)00676-1
M3 - Article
AN - SCOPUS:17344377534
VL - 294-295
SP - 354
EP - 357
JO - Physica B: Condensed Matter
JF - Physica B: Condensed Matter
SN - 0921-4526
ER -