Title :
Fabrication and characterization of (HgRe)Ba2Ca1 Cu2Oy thin films
Author :
Sastry, P.V.P.S.S. ; Su, J. ; Atwell, S.L. ; Durbin, S.M. ; Schwartz, J.
Author_Institution :
Nat. High Magnetic Field Lab., Tallahassee, FL, USA
fDate :
3/1/2001 12:00:00 AM
Abstract :
Thin films of (HgRe)Ba2Ca1Cu2O y (HgRe1212) superconductor were fabricated on Ag and LaAlO 3 (LAO) by reacting laser deposited ReBaCaCuO precursor films with CaHgO2 in sealed reaction tubes. The phase purity and superconducting properties of the final films depended significantly on the thickness of the precursor films. The minimum thickness of precursor films for complete conversion to the HgRe1212 phase was observed to be about 800 nm. The HgRe1212 films deposited and reacted under optimum conditions, on both Ag and LAO, showed excellent c-axis texture. Magnetization measurements of the as reacted superconducting films showed Tc values of 122-128 K, and exhibited open hysteresis loops up to 110 K
Keywords :
barium compounds; calcium compounds; high-temperature superconductors; magnetic hysteresis; magnetisation; mercury compounds; rhenium compounds; superconducting thin films; texture; (HgRe)Ba2Ca1Cu2O; (HgRe)Ba2Ca1Cu2Oy; 800 nm; Ag; CaHgO2; HgRe1212; HgRe1212 phase; LaAlO3; ReBaCaCuO; Tc values; c-axis texture; characterization; fabrication; magnetization; open hysteresis loops; optimum conditions; phase purity; precursor film thickness; sealed reaction tubes; superconducting films; superconducting properties; thin films; Coatings; Conductive films; Fabrication; Laboratories; Magnetic fields; Silver; Superconducting films; Superconducting thin films; Telephony; Transistors;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
