C-axis oriented (Hg,Ti)-based superconducting films with T c >125 K

F. Foong, B. Bedard, Q. L. Xu, Sy-Hwang Liou

Research output: Contribution to journalArticle

Abstract

Thin films with mostly (Hg,Tl) 1 Ba 2 Ca 3 Cu 2 O 8+δ [(Hg,Tl)-1223] phase have been fabricated by radio frequency magnetron sputtering of precursor films and post-annealing method. The doping of a small amount of thallium in the film is helpful to the formation of the three-layer CuO 2 compound. These films have a highly oriented structure with the c-axis perpendicular to the film surface. Resistivity measurements show that the films after annealing at 300°C for 1 h in O 2 have the superconducting transition temperature of T c (onset)=133 K and T c (zero)=127 K. Scanning electron micrographs of the film reveal platelike micrometer-size grains coalesce to cover the substrate surface.

Original languageEnglish (US)
Number of pages1
JournalApplied Physics Letters
StatePublished - Dec 1 1995

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superconducting films
annealing
thallium
micrometers
radio frequencies
magnetron sputtering
grain size
transition temperature
electrical resistivity
scanning
thin films
electrons

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

C-axis oriented (Hg,Ti)-based superconducting films with T c >125 K . / Foong, F.; Bedard, B.; Xu, Q. L.; Liou, Sy-Hwang.

In: Applied Physics Letters, 01.12.1995.

Research output: Contribution to journalArticle

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