منابع مشابه
Cation Ordering in Complex Oxides
Several recent papers have addressed the fundamental aspects of the stability and kinetics of ordering in complex oxides, and investigated systems where the properties are mediated by the degree of order. Cation ordering reactions have been shown to induce large alterations in the dielectric, ferroelectric, magnetic, and electronic response of many complex oxides. The majority of the cited publ...
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Single-phase perovskites were formed in the (1−x)Ba(Zn1/3Nb2/3)O3–(x)La(Zn2/3Nb1/3)O3 system for compositions with 0.0 ≤ x ≤ 0.6. Although the stability of the trigonal ‘‘1:2’’ ordered structure of the Ba(Zn1/3Nb2/3)O3 end member is very limited (0.0 ≤ x < 0.05), low levels of lanthanum induce a transformation to a cubic, ‘‘1:1’’ ordered structure that has a broad range of homogeneity (0.05 ≤ x...
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– We show that the low-temperature physics of molecular nanomagnets, contrary to the prevailing one-molecule picture, must be determined by the long-range magnetic ordering due to many-body dipolar interactions. The calculations here performed, using Ewald's summation, suggest a ferromagnetic ground state with a Curie temperature of about 130 mK. The energy of this state is quite close to those...
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The low-temperature cation-ordered superstructure of anhydrous sodium sodalite, a zeolite with composition Na 6 ͓AlSiO 4 ] 6 , has been determined through the use of both density functional theory ͑DFT͒ and classical force-field lattice energy minimizations. The charge-balancing Na ϩ cations are assumed to occupy their characteristic locations within the cubic alumino–silicate framework near the c...
متن کاملCation Ordering and Oxygen Stoichiometry in Double Perovskite
OF DOCTORAL DISSERTATION AALTO UNIVERSITY SCHOOL OF SCIENCE AND TECHNOLOGY P.O. BOX 11000, FI-00076 AALTO http://www.aalto.fi Author Eeva-Leena Rautama Name of the dissertation Cation Ordering and Oxygen Stoichiometry in Double Perovskite Systems, (Sr,La)2FeTaO6-δ and LaBaCo2O5+δ Manuscript submitted 30.4.2010 Manuscript revised N/A Date of the defence 16.7.2010 Monograph Article dissertation (...
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ژورنال
عنوان ژورنال: Chemistry Letters
سال: 1980
ISSN: 0366-7022,1348-0715
DOI: 10.1246/cl.1980.1185