Concept

Polarisation (diélectrique)

Publications associées (386)

Self-consistent ICRF simulations in fully shaped anisotropic plasmas

Jonathan Graves, Wilfred Anthony Cooper, Stephan Brunner, Martin Jucker, Nicolas Mellet

For self-consistent ICRF heating simulations, four codes have been coupled: VMEC[1] provides a fully shaped, anisotropic 3D MHD equilibrium (bi- Maxwellian distribution function), transferred to Boozer coordinates by TERPSICHORE[2]. The full-wave code LEMa ...

2009

Field-induced magnetic phases and electric polarization in LiNiPO4

Henrik Moodysson Rønnow

Neutron diffraction is used to probe the (H,T) phase diagram of magnetoelectric (ME) LiNiPO4 for magnetic fields along the c axis. At zero field the Ni spins order in two antiferromagnetic phases. One has commensurate (C) structures and general ordering ve ...

2009

Polarization field mapping of AlInN/AlN/GaN heterostructure

Nicolas Grandjean, Jean-François Carlin, Eric Feltin, Marcus Gonschorek, Anas Mouti

Off-axis electron holography has been used to measure the built-in potential profile across an Al0.85In0.15N/AlN/GaN high electron mobility transistor heterostructure. Profile measurements indicated a polarization-induced electric field of 6.9 MV/cm within ...

2009

Polarization field mapping of Al0.85In0.15N/AlN/GaN heterostructure

Nicolas Grandjean, Jean-François Carlin, Eric Feltin, Marcus Gonschorek, Anas Mouti

2009

Comments on origins of enhanced piezoelectric properties in ferroelectrics

Dragan Damjanovic

This review discusses recent advances in understanding origins of large piezoelectric properties in some ferroelectric materials. In particular, it addresses the role of polarization rotation and monoclinic phases. It is suggested that the polarization rot ...

2009

Instrument-independent specification of the diffraction geometry and polarization state of the incident X-ray beam

This work augments the proposal of Schwarzenbach & Flack [J. Appl. Cryst. (1989), 22, 601-605], who have advocated the use of a diffractometer-independent definition of the azimuthal angle

\psi

to specify the diffractiongeometry of a Bragg reflection. It ...

2009

Time-domain distributed sensor with 1 cm spatial resolution based on Brillouin dynamic gratings

Luc Thévenaz, Sang Hoon Chin, Nikolay Primerov, Kwang-Yong Song

We propose and experimentally demonstrate the highest-resolution BOTDA system ever reported using Brillouin dynamic grating in a polarization-maintaining fiber (PMF). Acoustic waves containing the information of local Brillouin frequency are generated by a ...

SPIE2009

A study of polarization effects in metal-ferroelectric-oxide-semiconductor capacitors

Mihai Adrian Ionescu, Giovanni Antonio Salvatore, Alexandru Rusu

In this paper we report the fabrication and detailed electrical characterization of a Metal-Ferroelectric-Oxide-Semiconductor Capacitor aiming at the extraction of the polarization characteristic. In order to evaluate the electrical performances of the fer ...

Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa2009

Polarization-induced distortion in stimulated Brillouin scattering slow-light systems

Luc Thévenaz, Sang Hoon Chin

The vector analysis of stimulated Brillouin scattering amplification in birefringent fibers is extended to include signal pulses. The analysis finds that the different slow-light delays experienced by the states of polarization corresponding to maximum and ...

Optical Society of America2009

Multicenter density functionals: revised expression of the standard approximations of exchange-correlation functional

Ursula Röthlisberger, Ivano Tavernelli, I-Chun Lin

We propose to express corrections to the standard approximations of the exchange-correlation functionals in the form of multiatom-centered functionals that can be related to the atoms-in-molecules theory of Bader and a multicenter density expansion. Unlike ...

2009

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Instrument-independent specification of the diffraction geometry and polarization state of the incident X-ray beam

This work augments the proposal of Schwarzenbach & Flack [J. Appl. Cryst. (1989), 22, 601-605], who have advocated the use of a diffractometer-independent definition of the azimuthal angle

\psi

to specify the diffractiongeometry of a Bragg reflection. It ...

2009