Tl 0 . 5 Pb 0 . 5 ) ( Sr 0 . 95 Ba 0 . 05 ) 2 ( Ca 0 . 8 Gd 0 . 2 ) Cu 2 O z 1212 superconducting films on lanthanum aluminate
نویسنده
چکیده
Superconducting films of (Tl0.5Pb0.5)(Sr0.95Ba0.05)2(Ca0.8Gd0.2)Cu2Oz 1212, approximately 3 μm in thickness, were fabricated on single-crystalline lanthanum aluminate. The films were practically phase pure and showed excellent in-plane and out-of-plane texture. Critical temperatures of up to 96 K were recorded. Critical current densities of the order of 40 MA m−2 at 77 K in self-field were measured both by transport and by magnetic studies. Magnetic measurements were made between 5 and 77 K. Microstructure studies were carried out to learn about the effects influencing the critical current density. (Some figures in this article are in colour only in the electronic version)
منابع مشابه
2 3 Se p 20 03 Enhancement of T c by Sr substitution for Ba in Hg - 2212 superconductor
The Ba substitution by Sr has been studied in two Hg-2212 series: Hg 2 (Ba 1−y Sr y) 2 YCu 2 O 8−δ and Hg 2 (Ba 1−y Sr y) 2 (Y 0.80 Ca 0.20)Cu 2 O 8−δ. In both series a T c enhancement of about 40 K is observed when Sr substitutes Ba from y = 0 to y = 1.0. The y = 0 compound of the first series is the non superconducting Hg 2 Ba 2 YCu 2 O 8−δ prototype. In the second series, this y = 0 compound...
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