TY - JOUR
T1 - Variation of vortex-glass dynamics and critical region with oxygen content in Bi2Sr2CaCu2O8+δ single crystal
AU - Darminto, D.
AU - Tjia, M. O.
AU - Nugroho, A. A.
AU - Menovsky, A. A.
AU - Shimoyama, J.
AU - Kishio, K.
N1 - Funding Information:
Travel support from QUE project of the Physics Department, ITB, is gratefully acknowledged by MOT.
PY - 2001/8
Y1 - 2001/8
N2 - A systematic analysis of disorder and anisotropy effects has been performed on the transport data of three oxygen doped Bi2Sr2CaCu2O8+δ (BSCCO-2212) single crystals obtained in external magnetic field aligned with the crystal c-axis, ranging from 100 Oe to 40 kOe. The result confirms the existence of finite critical region in all cases and ostensible crossover behavior associated with 3-D vortex-glass transition. The maximum widths of the regions ([T* - Tg]/Tg = 0.66, 0.53 and 0.38) as well as the critical exponents (s = 5.3 ± 1.3, 3.8 ± 0.7 and 2.8 ± 0.6) are shown to decrease consistently with lower anisotropy (γ2 = 19,500, 8300 and 3000) corresponding to samples with increasing doping. While being responsible for the suppression of first-order melting, the effect of stronger disorder also contributes to larger temperature and field ranges of the critical region.
AB - A systematic analysis of disorder and anisotropy effects has been performed on the transport data of three oxygen doped Bi2Sr2CaCu2O8+δ (BSCCO-2212) single crystals obtained in external magnetic field aligned with the crystal c-axis, ranging from 100 Oe to 40 kOe. The result confirms the existence of finite critical region in all cases and ostensible crossover behavior associated with 3-D vortex-glass transition. The maximum widths of the regions ([T* - Tg]/Tg = 0.66, 0.53 and 0.38) as well as the critical exponents (s = 5.3 ± 1.3, 3.8 ± 0.7 and 2.8 ± 0.6) are shown to decrease consistently with lower anisotropy (γ2 = 19,500, 8300 and 3000) corresponding to samples with increasing doping. While being responsible for the suppression of first-order melting, the effect of stronger disorder also contributes to larger temperature and field ranges of the critical region.
KW - BSCCO-2212
KW - Critical region and exponent
KW - Disorder and anisotropy
KW - Vortex-glass
UR - http://www.scopus.com/inward/record.url?scp=18844467378&partnerID=8YFLogxK
U2 - 10.1016/S0921-4534(01)00349-5
DO - 10.1016/S0921-4534(01)00349-5
M3 - Article
AN - SCOPUS:18844467378
SN - 0921-4534
VL - 357-360
SP - 617
EP - 620
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
ER -