منابع مشابه
Phase Equilibria in Systems Involving the Rare - Earth Oxides . Part II . Solid State Reactions in Trivalent Rare - Earth Oxide Systems
Selected mixtures in 2 l binary and 9 ternary rare-earth oxide syste ms were studied by X-ray diffraction after heat treatment aL 1,650° C and above. Two graphs were drawn to show specific r egions of stability for t he various strucLure types. Each givcs t he a verage ionic rad ius of constiLuent cations versus the mole percent of the smaller cation. One diagram is es~e ntiall :-' divided inLo...
متن کاملRare-earth solid-state qubits.
S. BERTAINA, S. GAMBARELLI, A. TKACHUK, I. N. KURKIN, B. MALKIN, A. STEPANOV AND B. BARBARA* Institut Néel, Département Nanosciences, CNRS, 25 Ave. des Martyrs, BP166, 38042 Grenoble Cedex 9, France Ecole Nationale Supérieure de Physique, INP de Grenoble, Minatec 3 parvis Louis Néel, BP 257, 38016 Grenoble Cedex 9, France Laboratoire de Chimie Inorganique et Biologie (UMR-E 3 CEA-UJF), DRFMC, C...
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We study a two-species reaction-diffusion problem described by a system consisting of a semilinear parabolic equation and a first order ordinary differential equation, endowed with suitable conditions. We prove the existing of a unique traveling wave profile and give necessary conditions and sufficient conditions for the occurrence of penetration and conversion fronts.
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The self-ditlusion coefficient D = De exp( —() /RT) for solid argon has been measured in thin specimens of large grain size by a tracer technique. The results, Dp=0.2+p. 14 '3~ cm~ sec ' and Q =3600+150 cal mole ', are lower than those obtained in previous investigations. The value of Q agrees reasonably well with a twobody absolute-rate calculation for vacancy migration, but not with calculati...
متن کاملCONTINUOUS FREE OSCILLATIONS: Atmosphere-Solid Earth Coupling
■ Abstract In 1997, after almost forty years since the initial attempt by Benioff et al (1959), continuous free oscillations of the Earth were discovered. Spheroidal fundamental modes between 2 and 7 millihertz are excited continuously with acceleration amplitudes of about 0.3–0.5 nanogals. The signal is now commonly found in virtually all data recorded by STS-1 type broadband seismometers at q...
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ژورنال
عنوان ژورنال: Earth and Planetary Science Letters
سال: 2007
ISSN: 0012-821X
DOI: 10.1016/j.epsl.2006.11.015