Zobrazeno 1 - 10
of 75
pro vyhledávání: '"Gérard Chouteau"'
Autor:
null Gérard Chouteau
Publikováno v:
Bulletin 1024. :147-152
Autor:
Pierre Strobel, Michael Holzapfel, Gérard Chouteau, Pierre Bordet, M. D. Núñez-Regueiro, Sébastien Diaz, Eric Chappel, Céline Darie, Sophie de Brion
Publikováno v:
Solid State Sciences. 7:497-506
The mixed layered oxide phases NaxLi1−xNiO2 were prepared and characterised by X-ray diffraction, chemical analysis and a thorough magnetic study. Single phase compounds were obtained for the nominal compositions 0 ⩽ x ⩽ 0.3 and 0.8 ⩽ x ⩽ 1
Publikováno v:
Journal of Physics: Condensed Matter. 17:2741-2747
We propose a new model for the understanding of the magnetic properties of CuFeO2, which differs significantly from the generally accepted two-dimensional Ising model. We show that a Heisenberg model with a relatively weak anisotropy gives a much bet
Publikováno v:
Journal of Physics: Condensed Matter. 17:241-248
High static magnetic field magnetization measurements have been performed up to 23 T on Ho(0.43)Y(2.57)Fe(5)O(12) single crystals at helium temperature (T = 4.2 K) with fields applied along the three main cubic axes: [Formula: see text], [Formula: se
Publikováno v:
Physica B: Condensed Matter. :146-149
We will present here results on the magnetic properties of two compounds, GeCo 2 O 4 and GeNi 2 O 4 , obtained by magnetic susceptibility and high magnetic field magnetization measurements. GeCo 2 O 4 shows an antiferromagnetic behaviour with an orde
Autor:
Santiago Suriñach, F. Dupont, Maria Dolores Baró, Juan Santiago Muñoz Domínguez, Josep Nogués, Jordi Sort, Gérard Chouteau, Eric Chappel
Publikováno v:
Journal of Metastable and Nanocrystalline Materials. 13:465-472
Publikováno v:
Solid State Communications. 119:83-87
The low field magnetic susceptibility and X-band ESR spectra of quasi-stoichiometric Li1−xNi1+xO2 samples have been measured. The anomaly around 240 K, observed in Li0.98Ni1.02O2 under a 1 mT field, disappears under the conventional magnetic fields
Autor:
Gérard Chouteau, Jean-Pierre Pereira-Ramos, N. Baffier, P. Wilmann, Stéphane Bach, André Sulpice, Eric Chappel, Daniel Caurant, V. Bianchi, C. Belhomme
Publikováno v:
Solid State Ionics. 140:1-17
A study is made on the conditions and methods of preparation of LiNiO 2 and their influence on lithium deficiency. A soft chemistry route by hydroxide precipitation and a classical ceramic method were used. In order to compensate the lithium deficien
Autor:
Gérard Chouteau, H. Sassik, R. Grössinger, K. Reiterer, R. Sato Turtelli, J.C. Téllez-Blanco, Robert Hauser
Publikováno v:
Physica B: Condensed Matter. :194-198
The coercive field of annealed SmCo3Cu2 and SmCo2.5Cu2.5 alloys was measured for different pulsed-field rate, dH/dt, for temperatures between 4 and 600 K. The temperature dependency of the magnetic viscosity parameter, Sv, was investigated in this ra
Autor:
V. Bianchi, Daniel Caurant, C. Delmas, Eric Chappel, N. Baffier, Céline Darie, Gérard Chouteau, M. D. Núñez-Regueiro
Publikováno v:
Physica B: Condensed Matter. :124-127
The high-field magnetization of quasi-stoichiometric Li1−xNi1+xO2 and NaNiO2 samples is measured. A new mechanism of magnetic frustration is proposed for Li1−xNi1+xO2. Finally, we comment on recent proposals of quantum spin orbital liquid.