Zobrazeno 1 - 10
of 32
pro vyhledávání: '"S. Darracq"'
Autor:
O. Vogt, S. Darracq, K. Mattenberger, S. Heathman, Dirk J.A. De Ridder, T. Le Bihan, U. Benedict, C. Abraham
Publikováno v:
Journal of Alloys and Compounds. 230:89-93
The high pressure behaviour of TmTe and of EuO have been investigated up to pressures of 49 and 63 GPa respectively, using the energy dispersive X-ray diffraction technique and synchrotron radiation. TmTe shows a phase transformation at 8 GPa to a po
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bb915fd8b928f87987cc1f8396fef73e
https://doi.org/10.1016/0925-8388(95)01940-5
https://doi.org/10.1016/0925-8388(95)01940-5
Publikováno v:
Journal of Solid State Chemistry. 114:88-94
A new mixed valence Cu(III)/Cu(IV) has been stabilized in the three-dimensional lattice of the perovskite-type oxide La{sub 1-x}Sr{sub x}CuO{sub 3}(O{le}x{le}0.25). Chemical analysis and XPS studies confirm the mixed valence. This compound shows meta
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7be830cbbf017ffd3ea24e240989587d
https://doi.org/10.1006/jssc.1995.1013
https://doi.org/10.1006/jssc.1995.1013
Autor:
S. Darracq, Gérard Demazeau, V.P. Gorkov, J. Etourneaua, Igor A. Presniakov, Léopold Fournès, Pavel B. Fabritchnyi, Konstantin V. Pokholok
Publikováno v:
J. Mater. Chem.. 5:553-556
Using 119SnIV as a diamagnetic probe in the perovskite lattice of AFeO3 oxides (ACa, Sr), the Fe disproportionation (2FeIV⇄ FeIII+ FeV) is discussed. An electronic phenomenon previously described for CaFeO3 is detected in SrFeO3 due to the local br
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7d43d96daeb819f67af0089e39003f03
https://doi.org/10.1039/jm9950500553
https://doi.org/10.1039/jm9950500553
Publikováno v:
High Pressure Research. 12:323-328
The Cu(III) oxides were investigated first for the unusual copper oxidation state and then for the high-Tc superconductivity. In the last case this property is observed when a mixed copper valence is stabilized : Cu(I)/Cu(II) or Cu(II)/Cu(III). A new
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fdf029da3d7a84700cd603be10cc9977
https://doi.org/10.1080/08957959408201677
https://doi.org/10.1080/08957959408201677
Autor:
Léopold Fournès, Pavel B. Fabritchnyi, Gérard Demazeau, Konstantin V. Pokholok, S. Darracq, Igor A. Presniakov, V.P. Gorkov
Publikováno v:
Solid State Communications. 91:681-685
The Fe(IV) disproportionation (2Fe(IV) ⇄ Fe(III) + Fe(V) was studied through Mossbauer spectroscopy using 119Sn(IV) as diamagnetic probe at the Fe(IV) site. The spectrum observed at 4.2 K was treated by the Hesse and Rubartsch's method. The magneti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::35d507046a0e914d4debf60f9f2a3594
https://doi.org/10.1016/0038-1098(94)00425-0
https://doi.org/10.1016/0038-1098(94)00425-0
Autor:
Alain Largeteau, Gérard Demazeau, M. Cambon, V. Ranieri, Olivier Cambon, S. Darracq, Julien Haines
Publikováno v:
ChemInform. 42
Single crystals of α-quartz type Si1-xGexO2 are prepared by the temperature gradient hydrothermal method in Ni—Cr autoclaves using pure water and crystobalite-type Si0.8Ge0.2O2 (
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0f7ad0290960a091ab7a955e4dec9ae3
https://doi.org/10.1002/chin.201130011
https://doi.org/10.1002/chin.201130011
Autor:
Alain Largeteau, Olivier Cambon, M. Cambon, Julien Haines, S. Darracq, Gérard Demazeau, V. Ranieri
Publikováno v:
Inorganic Chemistry
Inorganic Chemistry, American Chemical Society, 2011, 50 (10), pp.4632-4639. ⟨10.1021/ic200354p⟩
Inorganic Chemistry, American Chemical Society, 2011, 50 (10), pp.4632-4639. ⟨10.1021/ic200354p⟩
International audience; The substitution of germanium in the α-quartz structure is a method investigated to improve the piezoelectric properties and the thermal stability of α-quartz. Growth of α-quartz type Si(1-x)Ge(x)O(2) single crystals was pe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ae46d27f75ab09b30f5e797b20147742
https://hal.archives-ouvertes.fr/hal-00598364
https://hal.archives-ouvertes.fr/hal-00598364
Autor:
V.P. Gorkov, Léopold Fournès, S. Darracq, Igor A. Presniakov, Jean Etourneau, Pavel B. Fabritchnyi, Konstantin V. Pokholok, Gérard Demazeau
Publikováno v:
Solid State Communications. 87:109-114
A complex 119 Sn magnetic hyperfine structure revealing a large distribution of supertransferred fields H( 119 Sn 4+ ) with a mean value of 220 kOe has been observed at 4.2 K in strontium ferrate sample corresponding to the chemical formula SrFe 0.99
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d1712e47ae1bcb896c16aa05ce446537
https://doi.org/10.1016/0038-1098(93)90336-l
https://doi.org/10.1016/0038-1098(93)90336-l
Publikováno v:
Solid State Communications. 85:961-965
LaCuO3 can present two structural types versus the oxygen pressure value, a tetragonal form for P ≤ 50 kbar and a rhombohedral one for the highest pressures. In order to precise the physical properties of both structures two different approaches ha
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::730d937a06e8c0385b29467aa20efb0a
https://doi.org/10.1016/0038-1098(93)90713-w
https://doi.org/10.1016/0038-1098(93)90713-w
Autor:
S. Heathman, K. Mattenberger, D. J. A. De Ridder, O. Vogt, C. Abraham, T. Le Bihan, U. Benedict, S. Darracq
Publikováno v:
ChemInform. 27
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::465c05553cc97125297d2d3cc3a34560
https://doi.org/10.1002/chin.199613014
https://doi.org/10.1002/chin.199613014