Pyrochlores. X. Madelung energies of pyrochlores and defect fluorites
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چکیده
منابع مشابه
Tunable Magnon Weyl Points in Ferromagnetic Pyrochlores.
The dispersion relations of magnons in ferromagnetic pyrochlores with Dzyaloshinskii-Moriya interaction are shown to possess Weyl points, i. e., pairs of topologically nontrivial crossings of two magnon branches with opposite topological charge. As a consequence of their topological nature, their projections onto a surface are connected by magnon arcs, thereby resembling closely Fermi arcs of e...
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The pyrochlore solid solution (Na(0.33)Ce(0.67))2(Ir(1-x)Ru(x))2O7 (0≤x≤1), containing B-site Ru(IV) and Ir(IV) is prepared by hydrothermal synthesis and used as a catalyst layer for electrochemical oxygen evolution from water at pH<7. The materials have atomically mixed Ru and Ir and their nanocrystalline form allows effective fabrication of electrode coatings with improved charge densities ov...
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The idea of magnetic monopoles in spin ice has enjoyed much success at intermediate temperatures, but at low temperatures a description in terms of monopole dynamics alone is insufficient. Recently, numerical simulations were used to argue that magnetic impurities account for this discrepancy by introducing a magnetic equivalent of residual resistance in the system. Here we propose that oxygen ...
متن کاملRaman study of phonon modes in bismuth pyrochlores
D. J. Arenas,1,2 L. V. Gasparov,1 Wei Qiu,3 J. C. Nino,3 Charles H. Patterson,4 and D. B. Tanner2 1Department of Physics, University of North Florida, Jacksonville, Florida 32224, USA 2Department of Physics, University of Florida, Gainesville, Florida 32611, USA 3Department of Materials Science and Engineering, University of Florida, Gainesville, Florida 32611, USA 4School of Physics, Trinity C...
متن کاملSolid State Ionics 17 (1985) 159-167 North-Holland, Amsterdam DEFECT STRUCTURES AND MIGRATION MECHANISMS IN OXIDE PYROCHLORES
Using computer simulation techniques the defect structure and oxygen ion migration mechanism of oxide pyrochlores (eg. Gd2Zr207) was investigated in order to explain the decreased activation enthalpy for oxygen ion conductivity as a function of order. Shell model potentials were found to be necessary in order to obtain sufficiently accurate physical properties for the pyrochlore compound. The o...
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ژورنال
عنوان ژورنال: Canadian Journal of Chemistry
سال: 1976
ISSN: 0008-4042,1480-3291
DOI: 10.1139/v76-330