TY - JOUR
T1 - Vortex state in YBa2Cu3Oy crystals
T2 - Proceedings of the 7th International Symposium on Research
AU - Kobayashi, N.
AU - Nishizaki, T.
AU - Shibata, K.
AU - Sasaki, T.
N1 - Funding Information:
A part of this work was performed at High Filed Laboratory for Superconducting Materials, IMR, Tohoku University. This research is partly supported by a Grant-in-Aid for Scientific Research from the Ministry of Education, Science, Sports, and Culture of Japan.
PY - 2004/4/30
Y1 - 2004/4/30
N2 - The vortex phase diagram of high-Tc superconductor YBa 2Cu3Oy (YBCO) single crystals has been studied by resistivity and magnetization measurements in magnetic fields up to 30 T. The vortex matter in YBCO shows a complex and rich phase diagram being affected by small change of oxygen content. Furthermore, the low-temperature scanning tunneling microscopy of slightly overdoped YBCO crystals in magnetic fields up to 5 T has been performed. We find that the vortex image at 4.2 K and 1 T forms a distorted triangular pattern with a hexagonal symmetry, but at 5 T it shows a disordered pattern indicating the vortex glass phase. These results are consistent with the vortex phase diagram resulted from macroscopic properties.
AB - The vortex phase diagram of high-Tc superconductor YBa 2Cu3Oy (YBCO) single crystals has been studied by resistivity and magnetization measurements in magnetic fields up to 30 T. The vortex matter in YBCO shows a complex and rich phase diagram being affected by small change of oxygen content. Furthermore, the low-temperature scanning tunneling microscopy of slightly overdoped YBCO crystals in magnetic fields up to 5 T has been performed. We find that the vortex image at 4.2 K and 1 T forms a distorted triangular pattern with a hexagonal symmetry, but at 5 T it shows a disordered pattern indicating the vortex glass phase. These results are consistent with the vortex phase diagram resulted from macroscopic properties.
KW - High-T superconductor
KW - Scanning tunneling microscopy
KW - Vortex image
KW - Vortex phase diagram
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U2 - 10.1016/j.physb.2004.01.100
DO - 10.1016/j.physb.2004.01.100
M3 - Conference article
AN - SCOPUS:2142694473
VL - 346-347
SP - 329
EP - 333
JO - Physica B: Condensed Matter
JF - Physica B: Condensed Matter
SN - 0921-4526
IS - 1-4
Y2 - 20 July 2003 through 23 July 2003
ER -