Optical emission spectroscopy is used to study the dynamics of the plasma generated by pulsed-laser irradiation of a MgB2 target, both in a vacuum and at different Ar buffer gas pressures. The analysis of the time-resolved emission of selected species shows that the Ar background gas strongly influences the plasma dynamics. Above a fixed pressure, plasma propagation into Ar leads to the formation of blast waves causing both a considerable increase of the fraction of excited Mg atoms and a simultaneous reduction of their kinetic flux energy. These results can be particularly useful for optimizing MgB2 thin-film deposition processes. (C) 2002 American Institute of Physics.
OPTICAL EMISSION INVESTIGATION OF LASER-PRODUCED MGB2 PLUME EXPANDING IN AN AR BUFFER GAS / Bruzzese, Riccardo; Spinelli, Nicola; Velotta, Raffaele; Amoruso, Salvatore; X., Wang. - In: APPLIED PHYSICS LETTERS. - ISSN 0003-6951. - STAMPA. - 80:23(2002), pp. 4315-4317. [10.1063/1.1484549]
OPTICAL EMISSION INVESTIGATION OF LASER-PRODUCED MGB2 PLUME EXPANDING IN AN AR BUFFER GAS
BRUZZESE, RICCARDO;SPINELLI, NICOLA;VELOTTA, RAFFAELE;AMORUSO, SALVATORE;
2002
Abstract
Optical emission spectroscopy is used to study the dynamics of the plasma generated by pulsed-laser irradiation of a MgB2 target, both in a vacuum and at different Ar buffer gas pressures. The analysis of the time-resolved emission of selected species shows that the Ar background gas strongly influences the plasma dynamics. Above a fixed pressure, plasma propagation into Ar leads to the formation of blast waves causing both a considerable increase of the fraction of excited Mg atoms and a simultaneous reduction of their kinetic flux energy. These results can be particularly useful for optimizing MgB2 thin-film deposition processes. (C) 2002 American Institute of Physics.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
