Shalapska, T Stryganyuk, G Gektin, A Kotlov, A Demchenko, P Voloshinovskii, A
Published in
Journal of Physics Condensed Matter
Studies on the crystal structure and luminescence properties have been performed for the NaPr(1-x)Ce(x)P(4)O(12) polyphosphate series. Excitation and emission spectra of Pr(3+) and Ce(3+) luminescence from NaPrP(4)O(12):Ce(3+) clearly reveal an efficient Pr(3+ ) → Ce(3+) energy transfer via migration over the Pr(3+)-sub-lattice and a nonradiative r...
Artus, Mathieu Tahar, Lotfi Ben Herbst, Frédéric Smiri, Leila Villain, Françoise Yaacoub, Nader Grenèche, Jean-Marc Souad Ammar Fiévet, Fernand
Published in
Journal of Physics Condensed Matter
Highly crystalline CoFe(2)O(4) nanoparticles with different diameters ranging from 2.4 to 6.1 nm have been synthesized by forced hydrolysis in polyol. The size can be controlled through adjusting the nominal water/metal molar ratio. X-ray diffraction, transmission electron microscopy, x-ray absorption spectroscopy and (57)Fe Mössbauer spectrometry ...
Shalapska, T Stryganyuk, G Gektin, A Demchenko, P Voloshinovskii, A Dorenbos, P
Published in
Journal of Physics Condensed Matter
LiYP(4)O(12) polyphosphate doped with Ce(3+) ions was prepared by the melt solution technique. The crystal structure, interatomic distances, and atom coordination numbers were determined using x-ray powder diffraction. A study of the spectral-kinetic luminescent properties was performed employing excitation with pulsed radiation from a synchrotron ...
Tolédano, Pierre Katzke, Hannelore Machon, Denis
Published in
Journal of Physics Condensed Matter
The magnetostructural bcc-to-hcp phase transition in iron is analysed theoretically in the framework of the Landau theory of phase transitions. In contrast to recent interpretations which emphasize the driving role of magnetism at the transition, the collapse of the ferromagnetic order in ε-Fe is interpreted as resulting from the large spontaneous ...
Shalapska, T Stryganyuk, G Demchenko, P Voloshinovskii, A Dorenbos, P
Published in
Journal of Physics Condensed Matter
Luminescent-kinetic studies for LiY(0.9)Ce(0.1)P(4)O(12), LiGd(0.9)Ce(0.1)P(4)O(12) and NaGd(0.9)Ce(0.1)P(4)O(12) phosphates which were prepared by the melt solution technique have been performed using synchrotron radiation excitation within 3-12.4 eV energy range and x-ray radiation at T = 10-300 K. The [Formula: see text] transfer at 10 K and bid...
Machon, Denis Grzechnik, Andrzej Friese, Karen
Published in
Journal of Physics Condensed Matter
Rb(2)ZnCl(4) in the normal phase (T = 308-313 K) has been studied under pressure by means of single-crystal x-ray diffraction up to 3.84 GPa and Raman spectroscopy up to 5.9 GPa. No pressure-induced phase transition has been observed but an orientational disorder of the tetrahedra is enhanced with the pressure. At the same time a partial one-dimens...
M Haouari H Ben Ouada H Maaref H Hommel A P Legrand Hubert Hommel
Published in
Journal of Physics Condensed Matter
M Haouari H Hommel H Ben Ouada A P Legrand H Maaref A Gharbi A Jouini Hubert Hommel
Published in
Journal of Physics Condensed Matter
H. Béa Benedikt Ziegler M. Bibes A. Barthélémy P. Paruch
Published in
Journal of Physics Condensed Matter
Alan Kalitsov Pierre-Jean Zermatten Frédéric Bonell Gilles Gaudin Stéphane Andrieu Coriolan Tiusan Mairbek CHSHIEV Julian Velev
Published in
Journal of Physics Condensed Matter
