Zobrazeno 1 - 10
of 96
pro vyhledávání: '"B. Jannot"'
Publikováno v:
Physica B: Condensed Matter. 271:343-347
We have calculated the phonon dispersion curves of barium titanate (BaTiO 3 ) at room temperature. A lattice dynamical formalism using the shell model is used. This microscopic model includes the short-range interactions of axially symmetric type and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3118166969a81c23ee409166e648a0ff
https://doi.org/10.1016/s0921-4526(99)00202-1
https://doi.org/10.1016/s0921-4526(99)00202-1
Publikováno v:
Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Astronomy. 327:1077-1082
Resume La dynamique du reseau du titanate de plomb PbTiO 3 est etudiee en phase quadratique a l'aide d'un modele a coquille tenant compte des polarisabilites electroniques des ions de la maille elementaire et des interactions a longue et a courte por
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a57ba190c65ce9b3e3e5c47308aa1366
https://doi.org/10.1016/s1287-4620(00)87020-9
https://doi.org/10.1016/s1287-4620(00)87020-9
Publikováno v:
Annales de Chimie Science des Matériaux. 24:471-480
The lattice dynamics of barium titanate BaTiO 3 is discussed quantitatively in the framework of a shell model taking into account the electronic polarizabilities of the constituent ions and including Coulomb and short-range interactions. The results
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::df0682b4962925ddbc67bda9cc4f1715
https://doi.org/10.1016/s0151-9107(00)88439-1
https://doi.org/10.1016/s0151-9107(00)88439-1
Publikováno v:
Ferroelectrics. 168:115-120
The microscopic mechanism of birefringence in the tetragonal phase of PbTiO3 is discussed taking account of the dipole-dipole interaction (dipole-dipole effect) due to the ionic and electronic polarizations of the crystal and the spontaneous Kerr eff
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fb914acd820f5375903eeb6220edd2fe
https://doi.org/10.1080/00150199508007853
https://doi.org/10.1080/00150199508007853
Publikováno v:
Ferroelectrics. 166:175-180
The microscopic mechanism of optical anisotropy in the tetragonal phase of KNbO3 is discussed taking account of the dipole-dipole effect due to the ionic and electronic polarizations of the crystal and the spontaneous Kerr effect. The last effect is
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::637dfbdf25ca484af65b24cedfbba402
https://doi.org/10.1080/00150199508223586
https://doi.org/10.1080/00150199508223586
Publikováno v:
Solid State Communications. 92:827-830
The paper is concerned by the origin of the large r42 electro-optic coefficient in BaTiO3. First we establish the general relationship giving the dependence of the electro-optic coefficient in a large frequency range in terms of the elasto-optic, pie
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f764416187349acb8883a9a3e3e56858
https://doi.org/10.1016/0038-1098(94)90322-0
https://doi.org/10.1016/0038-1098(94)90322-0
Publikováno v:
Journal of Physics: Condensed Matter. 6:8923-8930
The z(yz)y Raman spectrum of a single-domain BaTiO3 crystal in the tetragonal phase (z is the ferroelectric axis) is carefully measured and analysed to determine the quasimodes. In this scattering geometry, the phonon wave vector q is at 45 degrees t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1d615163fadcd4ac8cfa5448adb083d8
https://doi.org/10.1088/0953-8984/6/42/022
https://doi.org/10.1088/0953-8984/6/42/022
Publikováno v:
Solid State Ionics. 73:139-145
The dependence on temperature and oxygen pressure of the electrical transport properties of the ferroelectric compound BaTiO3 doped with manganese or nickel is investigated in the temperature range 800–1100°C with an oxygen partial pressure contin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a6cf35695032165de3f3b59129d32468
https://doi.org/10.1016/0167-2738(94)90273-9
https://doi.org/10.1016/0167-2738(94)90273-9
Publikováno v:
Advanced Materials Research. :521-530
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::975bab3823030db32bf13df0e1621b6a
https://doi.org/10.4028/www.scientific.net/amr.1-2.521
https://doi.org/10.4028/www.scientific.net/amr.1-2.521
Publikováno v:
Europhysics Letters (EPL). 26:309-314
Significant discrepancies were generally reported in the dynamics of BaTiO3 between results deduced from various experimental techniques. Here dielectric and quasi-elastic light scattering measurements are investigated on high-quality BaTiO3 crystals
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5f0db345e7cf6c80386683a61d37090f
https://doi.org/10.1209/0295-5075/26/4/012
https://doi.org/10.1209/0295-5075/26/4/012