Title :
Properties of MgB2 films grown by means of different vapor phase techniques
Author :
Mancini, A. ; Galluzzi, V. ; Vetrella, U. Besi ; Boffa, V. ; Celentano, G. ; Ciontea, L. ; Gambardella, U. ; Grassano, G. ; Petrisor, T. ; Rufoloni, A. ; Sprio, S. ; Vadrucci, M.
Author_Institution :
ENEA Res. Center, Rome, Italy
fDate :
6/1/2003 12:00:00 AM
Abstract :
The formation and characterization of MgB2 thin films is explored, using room-temperature deposition of precursor layers and subsequent annealing in-situ. Precursors were deposited by means of pulsed laser deposition (PLD), electron beam (EB), and sputtering (SD) techniques. Best results were obtained for B/Mg multilayers deposited by EB and annealed at 630°C for 10 minutes, showing typical TCon and TC0 values of about 32-34 K and 31-32 K, respectively. Structural and morphological analyses were performed by x-ray diffraction and SEM. A comparison among the different growth techniques is presented. Results are explained taking into account the pressure-temperature phase diagram of the Mg-B system.
Keywords :
X-ray diffraction; annealing; crystal morphology; crystal structure; electron beam deposition; magnesium compounds; phase diagrams; pulsed laser deposition; scanning electron microscopy; sputtered coatings; superconducting thin films; superconducting transition temperature; type II superconductors; 10 min; 31 to 32 K; 32 to 34 K; 630 C; MgB2; MgB2 films; SEM; annealing; characterization; electron beam techniques; formation; morphological analyses; precursor layers; pulsed laser deposition; room-temperature deposition; sputtering techniques; vapor phase techniques; x-ray diffraction; Annealing; Electron beams; High temperature superconductors; Nonhomogeneous media; Optical pulses; Pulsed laser deposition; Sputtering; Superconducting devices; Superconducting films; Superconducting materials;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2003.812297
