Browsing by Subject "Substrates"

Article

Ambiguous Role of Growth-Induced Defects on the Semiconductor-to-Metal Characteristics in Epitaxial VO2/TiO2 Thin Films

Mihailescu, C. N.; Symeou, E.; Svoukis, E.; Negrea, R. F.; Ghica, C.; Teodorescu, V.; Tanase, L. C.; Negrila, C.; Giapintzakis, John (2018)

Controlling the semiconductor-to-metal transition temperature in epitaxial VO2 thin films remains an unresolved question both at the fundamental as well as the application level. Within the scope of this work, the effects ...

Article

Composite DLC-metal/metal-carbide coatings produced by electron enhanced unbalanced magnetron sputtering

Rebholz, Claus; Ziegele, H.; Voevodin, A. A.; Schneider, J. M.; Matthews, A. (1997)

Composite coatings consisting of metal containing diamond like carbons were produced by unbalanced magnetron sputtering in a closed field magnetic configuration. Targets of Pta and W were poisoned with acetylene during the ...

Article

Growth and structural characterization of orthorhombic and tetragonal SrCuO2 thin films

Mihailescu, C. N.; Pasuk, I.; Athanasopoulos, G. I.; Luculescu, C.; Socol, M.; Saint-Martin, R.; Revcolevschi, A.; Giapintzakis, John (2013)

Epitaxial SrCuO2 thin films were grown on (0 0 1) SrTiO 3 substrates by pulsed laser deposition using a stoichiometric target. X-ray diffraction indicated that the SrCuO2 films undergo a structural phase transition as a ...

Article

Growth and transport properties of HT-Li xCoO 2 thin films deposited by pulsed laser deposition

Svoukis, E.; Athanasopoulos, G. I.; Moradpour, A.; Schneegans, O.; Revcolevschi, A.; Giapintzakis, John (2012)

The successful in situ growth of single phase, c-axis oriented, layered structured Li xCoO 2 thin films on (0 0 0 1) Al 2O 3 substrates by pulsed laser deposition is reported. Thin films were grown in an oxygen pressure ...

Article

Growth of polycrystalline LaNi 1-xCo xO 3 (x = 0.3, 0.5) thin films on Si(100) by pulsed laser deposition

Androulakis, J.; Klini, A.; Manousaki, A.; Violakis, G.; Giapintzakis, John (2004)

Polycrystalline LaNi 1_xCo xO 3 (x = 0.5, 0.3) thin films have been deposited on polished Si(lOO) substrates by pulsed laser deposition. The films are grown at 650°C in ambient oxygen pressure of 0.4 mbar with an incident ...

Article

KrF pulsed laser deposition of La5Ca9Cu24O41 thin films on various substrates

Pervolaraki, M.; Athanasopoulos, G. I.; Saint-Martin, R.; Revcolevschi, A.; Giapintzakis, John (2009)

Recent studies on single crystals of cuprate oxides containing spin chains and ladders have reported large anisotropic magnon-mediated thermal conductivity. A potential use of thin films of such materials could be in the ...

Article

Low-temperature growth of NiMnSb thin films by pulsed-laser deposition

Giapintzakis, John; Grigorescu, C.; Klini, A.; Manousaki, A.; Zorba, V.; Androulakis, J.; Viskadourakis, Z.; Fotakis, C. (2002)

We report the growth of thin films of the ferromagnetic half-Heusler alloy NiMnSb by pulsed-laser deposition on Si (111) and polycrystalline InAs substrates. Highly crystalline films are grown using low substrate temperatures ...

Article

Matrix assisted pulsed laser evaporation of Mn 12(Propionate) thin films

Pervolaraki, M.; Sima, F.; Socol, G.; Teodorescu, C. M.; Gheorghe, N. G.; Socol, M.; Mihailescu, I. N.; Moushi, E. E.; Tasiopoulos, Anastasopoulos J.; Athanasopoulos, G. I.; Viskadourakis, Z.; Giapintzakis, John (2012)

Single molecule magnets are of great interest due to a multitude of potential applications for some of which thin films are required. Traditional physical vapor deposition techniques are not suitable for the deposition of ...

Article

Measurement of liquid crystal film thickness using interferometry

Kossivas, F.; Kyprianou, Andreas (2010)

Thickness measurements of thin films having thickness less than 1 µm are difficult to obtain by an interferometer. These difficulties arise from the overlap of the fringes from the upper and lower surfaces of the thin ...

Article

Origin of the stabilization of the metastable tetragonal high-pressure phase in SrCuO2 thin films grown on SrTiO3 substrates by pulsed laser deposition

Mihailescu, C. N.; Pasuk, I.; Straticiuc, M.; Nita, C. R.; Pantelica, D.; Giapintzakis, John (2014)

In this work we have systematically investigated the evolution of structure and stoichiometry in SrCuO2 films grown on TiO2-terminated SrTiO3 substrates as a function of the substrate temperature. Depending on the growth ...

Article

Partially yttria-stabilized zirconia coatings produced under plasma-assisted EBPVD with bipolar pulsed bias and under electron bombardment-assisted positive bias conditions

Matthews, A.; Young, S. J.; Joseph, M.; Rebholz, Claus; Schneider, J. M.; Dowey, S. J. (1997)

Previous research using radio frequency (rf) plasma-assisted electron beam (EB) PVD to deposit partially yttria-stabilized zirconia (PYSZ) thermal barrier coatings has shown the benefits of this method in terms of structure ...

Article

Pulsed laser deposition of highly textured La 5Ca 9Cu 24O 41 films on SrLaAlO 4 (1 0 0) and Gd 3Ga 5O 12 (1 0 0) substrates

Pervolaraki, M.; Pasuk, I.; Stan, G. E.; Giapintzakis, John (2012)

The growth of La 5Ca 9Cu 24O 41 thin films on SrLaAlO 4 (1 0 0) and Gd 3Ga 5O 12 (1 0 0) substrates by pulsed laser deposition is reported in this paper. The influence of deposition process parameters, such as oxygen ...

Article

Pulsed-laser deposition of NiMnSb thin films at moderate temperatures

Giapintzakis, John; Grigorescu, C.; Klini, A.; Manousaki, A.; Zorba, V.; Androulakis, J.; Viskadourakis, Z.; Fotakis, C. (2002)

Thin films of the half-Heusler alloy NiMnSb, which is predicted by band-structure calculations to be a half-metallic ferromagnet, were grown on various substrates (Si and InAs) using pulsed-laser deposition. The growth ...

Conference Object

Stoichiometry issues in pulsed laser deposition of the ferromagnetic alloy NiMnSb

Grigorescu, C. E. A.; Monnereau, O.; Manea, S. A.; Notonier, R.; Klini, A.; Zorba, V.; Manousaki, A.; Giapintzakis, John; Fotakis, C. (Affiliation: NIRDO, BucharestAffiliation: MADIREL, Univ. Provence Centre St. Charles, Marseille, FranceAffiliation: Natl. Inst. Res. Devmt. Mat. Phy., BucharestAffiliation: Foundation for Res. and Technology, HELLAS, Inst. Electron. Structure and Laser, Heraklion, Crete, GreeceCorrespondence Address: Grigorescu, C.E.A.NIRDO, Bucharest, 2002)

We report on the reproducible growth of stoichiometric thin films of ferromagnetic intermetallic compound NiMnSb by pulsed laser deposition (PLD) on various substrates. The films are grown at moderate temperature (around ...

Article

Structural and thermal characterization of La5Ca 9Cu24O41 thin films grown by pulsed laser deposition on (1 1 0) SrTiO3 substrates

Svoukis, E.; Athanasopoulos, G. I.; Altantzis, T.; Lioutas, C.; Martin, R. S.; Revcolevschi, A.; Giapintzakis, John (2012)

In the present study stoichiometric, b-axis oriented La5Ca 9Cu24O41 thin films were grown by pulsed laser deposition on (1 1 0) SrTiO3 substrates in the temperature range 600-750 °C. High resolution transmission electron ...

Article

Structure, mechanical and tribological properties of sputtered TiAlBN thin films

Rebholz, Claus; Schneider, J. M.; Voevodin, A. A.; Steinebrunner, J.; Charitidis, C.; Logothetidis, S.; Leyland, A.; Matthews, A. (1999)

TiAlBN films were produced by simultaneously sputtering from TiAl and TiB2 targets in Ar/N2 mixtures at a substrate temperature of 150 °C. The goal of this investigation was to study the influence of the nitrogen content ...

Article

Thermoelectric properties of Bi0.5Sb1.5Te3 thin films grown by pulsed laser deposition

Symeou, E.; Pervolaraki, M.; Mihailescu, C. N.; Athanasopoulos, G. I.; Papageorgiou, C.; Kyratsi, Theodora; Giapintzakis, John (2015)

We report on the pulsed laser deposition of p-type Bi0.5Sb1.5Te3 thin films onto fused silica substrates by ablation of dense targets of Bi0.5Sb1.5Te3 with an excess of 1 wt% Te. We investigated the effect of film thickness, ...

Article

Thermoelectric properties of Mg2Si coatings deposited by pack cementation assisted process on heavily doped Si substrates

Stathokostopoulos, D.; Stefanaki, E. C.; Ioannou, M.; Polymeris, G. S.; Chaliampalias, D.; Pavlidou, E.; Kyratsi, Theodora; Paraskevopoulos, K. M.; Vourlias, G.; Hatzikraniotis, E. (2014)

This work presents a study of structural and thermoelectric properties of Mg2Si coatings deposited on heavily doped p- and n-type Si substrates, at 650 C. The as-grown layers were smooth and uniform in thickness without ...

Article

Thin liquid crystal film for corrosion sensing

Kossivas, F.; Kyprianou, Andreas (2008)

The anchoring energy of Liquid Crystals (LCs) is influenced by several parameters. Many scientists have exploited LCs anchoring in order to develop several LC based optical sensors. This paper proposes and proves a new ...

Article

The use of pulsed laser deposited seed layers for the aqueous solution growth of highly oriented ZnO nanowires on sapphire substrates at 95 C: Study of their photocatalytic activity in terms of octadecanoic (stearic) acid degradation

Kenanakis, G.; Pervolaraki, M.; Giapintzakis, John; Katsarakis, N. (2013)

The photocatalytic activity of ZnO nanowires grown via an aqueous solution approach at 95 C onto sapphire substrates, which were first pre-coated with ZnO seed layers deposited by pulsed laser deposition at various ...