INDUCED SUPERCONDUCTIVITY IN TETRAGONAL YBA2CU3O6 BY INCORPORATION OF CA

被引：29

作者：

LIU, RS ^{[1
]}

COOPER, JR ^{[1
]}

LORAM, JW ^{[1
]}

ZHOU, W ^{[1
]}

LO, W ^{[1
]}

EDWARDS, PP ^{[1
]}

LIANG, WY ^{[1
]}

CHEN, LS ^{[1
]}

机构：

[1] IND TECHNOL RES INST,MAT RES LABS,HSINCHU,TAIWAN

来源：

SOLID STATE COMMUNICATIONS | 1990年 / 76卷 / 05期

关键词：

D O I：

10.1016/0038-1098(90)90115-R

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The effects of the substitution of Y3+ by Ca2+ in semiconducting, tetragonal YBa2Cu3O6+δ (δ=0.10+0.01) were studied by electrical resistivity, X-ray diffraction (XRD), energy dispersive X-ray spectrometry (EDS), selected area electron diffraction (SAED) and heat capacity measurements. The maximum Tc (20K) was found for 25-30% Ca incorporation in the YBa2Cu3O6.10 compound; we find that this is also the maximum solubility limit for Ca doping. SAED patterns are consistent with disorder between the Ca and Y ions along the crystal c axis. The specific heat anomaly around 23K was observed with Δ(Tc)/Tc ∼ 2 mJ/g.at K2 and γ(0) ∼ 1.3 mJ/g.at K2. © 1990.

引用

页码：679 / 683

页数：5

共 8 条

[1] CHEMICAL AND STRUCTURAL RELATIONSHIPS IN HIGH-TC MATERIALS [J].