Title :
Microwave absorption of Fe-doped YBCO films
Author :
Lofland, S.E. ; Ogale, S.B. ; Rajeswari, M. ; Chougule, D.D. ; Bhagat, S.M. ; Venkatesan, T.
Author_Institution :
Dept. of Phys., Maryland Univ., College Park, MD, USA
fDate :
6/1/1995 12:00:00 AM
Abstract :
Thin films of YBa/sub 2/Cu/sub 3-x/Fe/sub x/O/sub 7-y/ (0/spl les/x/spl les/0.2) were made by pulsed laser deposition using different O/sub 2/ pressures and annealing times. Their microwave absorption was measured and shows that the preparation conditions have a profound effect on the surface resistance. That is, if the Fe incorporation was successful, the microwave absorption had a large peak near T/sub c/. Various other diagnostics such as X-ray, ac susceptibility and atomic-force microscopy have also been performed.<>
Keywords :
X-ray diffraction; annealing; atomic force microscopy; barium compounds; electromagnetic wave absorption; high-temperature superconductors; iron; magnetic susceptibility; pulsed laser deposition; superconducting thin films; superconducting transition temperature; surface conductivity; yttrium compounds; 4.2 to 78 K; 50 to 210 min; AC susceptibility; Fe incorporation; O/sub 2/ pressure; X-ray diffraction; YBa/sub 2/Cu/sub 3-x/Fe/sub x/O/sub 7-y/ thin films; YBa/sub 2/Cu/sub 3/O/sub 7/:Fe; annealing time; atomic-force microscopy; microwave absorption; preparation conditions; pulsed laser deposition; superconducting critical temperature; surface resistance; Annealing; Electrical resistance measurement; Electromagnetic wave absorption; Iron; Masers; Optical pulses; Pulsed laser deposition; Sputtering; Surface resistance; Yttrium barium copper oxide;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
