HIGH MAGNETIC-FIELD MEASUREMENTS ON LA1.85SR0.15CUO4-DELTA AND YBA2CU3O7-DELTA

被引：1
|
作者：
VANBENTUM, PJM
VANKEMPEN, H
VANDELEEMPUT, LEC
PERENBOOM, JAAJ
SCHREURS, LWM
VANDERSTEEN, E
TEUNISSEN, PAA
机构：
[1] Univ of Nijmegen, Netherlands
来源：
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 1988年 / 153卷 / 02期
关键词：
Ceramic Materials - Oxides;
D O I：
10.1016/0921-4534(88)90383-8
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We have measured the magnetoresistivity of the high-Tc superconductors La1.85Sr0.15CuO4-δ and YBa2Cu3O7-δ in dc magnetic fields up to 25 tesla. Conservative extrapolations yield values for the upper critical field at T=0 of 38±5 T for La1.85Cr0.15 CuO4-δ, and of 200±25 T for YBa2Cu3O7-δ. The slope (-dBc2/dT) near Tc for YBa2Cu3O7-δ is about twice as large as in La1.85Sr0.15CuO4-δ. This suggests that the higher Tc of YBa2Cu3O7-δ compared with La1.85 Sr0.15O4-δ may be due to an increased density of states at the Fermi level. For both compounds the magnetoresistivity indicates a large anisotropy of the critical field and a strong spin-orbit scattering.
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页码：1485 / 1486
页数：2
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