Browsing by Subject "Pulsed laser deposition"

Article

Data storage applications based on LiCoO2 thin films grown on Al2O3 and Si substrates

Svoukis, E.; Mihailescu, C. N.; Mai, V. H.; Schneegans, O.; Breza, K.; Lioutas, C.; Giapintzakis, John (2015)

In this study, LiCoO2 thin films were investigated for data storage applications based on scanning probe mediated approaches. LiCoO2, compared to other materials proposed for scanning probe mediated nanoscale patterning, ...

Conference Object

Electron microscopy study of thermoelectric (BixSb1-x)2Te3thin film

Breza, A.; Lioutas, C. B.; Giapintzakis, John (Springer Science and Business Media, LLC, 2015)

In the present work, transmission electron microscopy (TEM) techniques were used in order to study the morphology and investigate the structural properties of a (BixSb1-x)2Te3(BST) thin film. The sample was fabricated on ...

Article

Enhancing the nanoscratch resistance of pulsed laser deposited DLC films through molybdenum-doping

Constantinou, M.; Pervolaraki, M.; Koutsokeras, L.; Prouskas, C.; Patsalas, P.; Kelires, P.; Giapintzakis, John; Constantinides, G. (2017)

Pulsed laser deposition was used to grow DLC and molybdenum-doped DLC (DLC:Mo) films, with metal contents up to 3.2 at.%, on silicon substrates. The microstructural details of the films were investigated using X-ray ...

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

Large positive magnetoresistance in nonstoichiometric NiMnSb thin films on silicon

Branford, W. R.; Clowes, S. K.; Syed, M. H.; Bugoslavsky, Y. V.; Gardelis, S.; Androulakis, J.; Giapintzakis, John; Grigorescu, C. E. A.; Berenov, A. V.; Roy, S. B.; Cohen, L. F. (2004)

The transport properties of pulsed-laser-deposited NiMnSb films on silicon as a function of film thickness were discussed. It was found that a low-temperature upturn was observed in the resistivity for film thicknesses of ...

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

Magnetic properties of the half-metallic ferromagnet NiMnSb grown on InSb by pulsed laser deposition

Androulakis, J.; Gardelis, S.; Giapintzakis, John; Buckle, P. D. (2004)

We have grown films of the half-metallic ferromagnet NiMnSb on single crystals of the narrow gap semiconductor InSb by pulsed laser deposition. NiMnSb is a possible candidate for spin injection applications. The film ...

Article

Magnetoresistance of magnetite thin films grown by pulsed laser deposition on GaAs(1 0 0) and Al2O3(0 0 0 1)

Paramês, M. L.; Viskadourakis, Z.; Giapintzakis, John; Rogalski, M. S.; Conde, O. (2007)

Magnetotransport properties of magnetite thin films deposited on gallium arsenide and sapphire substrates at growth temperatures between 473 and 673 K are presented. The films were grown by UV pulsed laser ablation in ...

Article

Minority-spin band parameters in a NiMnSb thin film determined by spectral conductivity

Grigorescu, C. E. A.; Trodahl, H. J.; Strickland, N. M.; Bittar, A.; Manea, S. A.; Giapintzakis, John; Monnereau, O.; Notonier, R.; Kennedy, V. J. (2004)

NiMnSb is expected to be a ferromagnetic half metal, an expectation that is based in part on band structure calculations. Here we report optical conductivity studies of the band structure for a film prepared by pulsed laser ...

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

Picosecond ultrafast pulsed laser deposition of SrTiO3

Pervolaraki, M.; Mihailescu, C. N.; Luculescu, C. R.; Ionescu, P.; Dracea, M. D.; Pantelica, D.; Giapintzakis, John (2015)

SrTiO3 particle-composed films were grown on Si substrates via picosecond ultrafast pulsed laser deposition. We have investigated the effect of laser pulse repetition rate (0.2-8.2 MHz) and fluence (0.079-1.57 J cm-2) on ...

Article

PLD of Fe3O4 thin films: Influence of background gas on surface morphology and magnetic properties

Paramês, M. L.; Mariano, J.; Viskadourakis, Z.; Popovici, N.; Rogalski, M. S.; Giapintzakis, John; Conde, O. (2006)

Ablation of Fe3O4 targets has been performed using a pulsed UV laser (KrF, λ = 248 nm, 30 ns pulse duration) onto Si(100) substrates, in reactive atmospheres of O2 and/or Ar, with different oxygen partial pressures. The ...

Article

Pulsed laser deposition and thermal characterization of Ni-doped La5Ca9Cu24O41 thin films

Athanasopoulos, G. I.; Pervolaraki, M.; Svoukis, E.; Androulakis, J.; Saint-Martin, R.; Revcolevschi, A.; Giapintzakis, John (2011)

Highly b-axis oriented polycrystalline Ni-doped La5Ca 9Cu24O41 thin films have been grown on (0 0 1) SrTiO3 substrates using the pulsed laser deposition technique. EDX measurements have revealed nearly stoichiometric ...

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 homo- and hetero-epitaxial thin films of the exotic La5Ca9Cu24O41 compound on oxide and Si substrates

Pervolaraki, M.; Singh, S.; Athanasopoulos, G. I.; Saint-Martin, R.; Revcolevschi, A.; Giapintzakis, John (2010)

Pristine and transition metal-doped La5Ca9Cu 24O41 thin films were fabricated by pulsed laser deposition in oxygen atmosphere. The effect of magnetic doping, type of substrate and growth temperature on the crystallographic ...

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 ...

Article

Recent advances in spintronics. Half-metal ferromagnets: Their role in spintronics

Gardelis, S.; Androulakis, J.; Migiakis, P.; Giapintzakis, John (2004)

A review of recent advances in spintronics is presented. We report the structural, magnetic, electrical and thermal properties of the ferromagnetic half-Heusler alloy NiMnSb grown by arcmelting. The bulk material is used ...