Concept

Titanate de strontium

Publications associées (296)

Electron transfer kinetics on composite diamond (sp3)-graphite (sp2) electrodes

The concept of non-diamond sp2 impurity states as charge transfer mediators on boron-doped diamond (BDD) surface was suggested as an explanation for the electrochem. behavior of synthetic diamond-based electrodes. To verify this concept, graphite particles ...

2003

Platinum particles deposited on synthetic boron-doped diamond surfaces. Application to methanol oxidation

Christos Comninellis, Ilaria Duo

Two methods were used for the deposition of Pt particles on synthetic B-doped diamond (BDD) surfaces: chem. deposition and electrodeposition under potentiostatic conditions. However, electrodeposition leads much higher Pt dispersion than chem. deposition. ...

2003

Boron doped diamond electrodes for nitrate elimination in concentrated wastewater

Christos Comninellis

Electrochem. and phys. properties of polycryst. B-doped diamond electrodes with a metallic conduction grown by MPCVD and HFCVD were studied with the goal to use them as cathodes, for the electrochem. redn. of nitrate in neutral solns. All electrodes contai ...

2003

Study of pure and gadolinium doped single crystals of europium monoxide by nuclear magnetic resonance

Arnaud Comment

We performed an Eu153 and Eu151 NMR study of EuO and Gd doped EuO using a home-made spectrometer designed to measure signals with fast spin-spin relaxation times. We determined and described the broadening mechanisms giving rise to the structure in the lin ...

EPFL2003

Specific heat capacity and Debye temperature of zirconia and its solid solution

Manuel Alexandre Pouchon

Specific heat CP of zirconia and yttria stabilized zirconia doped or not with erbia and ceria was measured from 128 to 823 K and of yttria stabilized zirconia doped with erbia and plutonia from 443 to 1573 K. The new determined data were modelled using Deb ...

Elsevier2003

Low-T ferroelectricity in antiphase domain boundaries of SrTiO3

Alexander Tagantsev

The ferroelectric transition of bulk strontium titanate is suppressed by a combination of two effects: (1) the structural changes produced by the antiferrodistortive transition at T-a =105 K and (2) the quantum fluctuations. The structural changes are stro ...

2002

Strain-induced diffuse dielectric anomaly and critical point in perovskite ferroelectric thin films

Nava Setter, Paul Muralt, Alexander Tagantsev

It is shown that a strong but diffuse dielectric anomaly, commonly expected only in disordered ferroelectrics, may be inherent in strained and defect-free perovskite ferroelectric thin films. The origin of this unusual anomaly, which was never predicted fo ...

2002

Systematic studies of (magneto)transport, structural and electronic properties of ultra-thin films of high-T-c cuprates and related layered oxides

Giorgio Margaritondo, Davor Pavuna, Dominique Cloëtta, Mike Abrecht

Properties of ultra-thin films are different from their single crystal counterparts due to the presence of (substrate induced) strain, different degree and type of (growth induced) disorder and different average doping (distribution of oxygen vacancies, fo ...

2002

Structural phase transition in early growth of Bi2Sr2CaCu2O8+x films on SrTiO3 substrates

Giorgio Margaritondo, Davor Pavuna, Mike Abrecht

We used pulsed laser deposition, with a Bi2Sr2CaCu2O8+x target, to grow films ranging from (1/4) to 10 unit cells thick. We studied these films, and reference Bi2Sr2CaCu2O8+x single crystal samples, using angle-integrated photoemission, core level photoemi ...

2002

Fluctuations and Landau-Devonshire expansion for barium titanate

Alexander Tagantsev

The experimentally observed temperature dependence of the quartic coefficients in the Landau-Devonshire expansion for BaTiO3 is naturally accounted for within a proper fluctuation model. It is explained, in particular, why one of the quartic coefficients v ...

2002

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