Optimization of La{sub 0.7}Ba{sub 0.3}MnO{sub 3-{delta}} complex oxide laser ablation conditions by plume imaging and optical emission spectroscopy

Journal Article · Sun Aug 15 00:00:00 EDT 2010 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.3467770· OSTI ID:21476415

Amoruso, S; Bruzzese, R; Scotti di Uccio, U ^[1]; Aruta, C; Granozio, F Miletto; Wang, X ^[2]; Maccariello, D ^[1]; Maritato, L; Orgiani, P ^[2]

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1. Dipartimento di Scienze Fisiche, Universita degli Studi di Napoli Federico II, Complesso Universitario di Monte S. Angelo, Via Cintia, I-80126 Napoli (Italy)
2. CNR-SPIN, Complesso Universitario di Monte S. Angelo, Via Cintia, I-80126 Napoli (Italy)

The properties of thin films of complex oxides, such as La{sub 1-x}D{sub x}MnO{sub 3-{delta}} (D=Ba, Ca, Sr, etc.), produced by pulsed laser deposition depend critically on the experimental parameters in which laser ablation is carried out. Here, we report a comparative analysis of the pulsed laser ablation process of La{sub 0.7}Ba{sub 0.3}MnO{sub 3-{delta}}, in oxygen background, in the ambient pressure range from 10{sup -2} to 1 mbar, typically employed in pulsed laser deposition of manganites. The laser ablation plume was studied by using time-gated imaging and optical emission spectroscopy techniques. It was found that at a pressure of {approx_equal}10{sup -2} mbar, the plume species arriving at the substrate are characterized by hyperthermal kinetic energy ({approx_equal}10 eV), and high degree of excitation. On the contrary, at larger oxygen pressure (0.1-1 mbar), the velocity of plume species reaching the substrate, and their degree of excitation are much reduced by the confining effects of the background gas. These features explain why an appropriate choice of the experimental conditions in which the deposition process is carried out leads to better quality films, providing helpful indications to improve control over the growth process of both La{sub 1-x}D{sub x}MnO{sub 3-{delta}} and other perovskitic oxides.

• OSTI ID: 21476415
• Journal Information: Journal of Applied Physics, Vol. 108, Issue 4; Other Information: DOI: 10.1063/1.3467770; (c) 2010 American Institute of Physics; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABLATION
CALCIUM COMPOUNDS
CONCENTRATION RATIO
CRYSTAL GROWTH
EMISSION SPECTROSCOPY
ENERGY BEAM DEPOSITION
EV RANGE
EXCITATION
KINETIC ENERGY
LANTHANUM COMPOUNDS
LASER RADIATION
MANGANATES
PULSED IRRADIATION
SUBSTRATES
THIN FILMS
VAPOR DEPOSITED COATINGS
ALKALINE EARTH METAL COMPOUNDS
COATINGS
DEPOSITION
DIMENSIONLESS NUMBERS
ELECTROMAGNETIC RADIATION
ENERGY
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
FILMS
IRRADIATION
MANGANESE COMPOUNDS
OXYGEN COMPOUNDS
RADIATIONS
RARE EARTH COMPOUNDS
SPECTROSCOPY
SURFACE COATING
TRANSITION ELEMENT COMPOUNDS