Nanocheckerboard modulations in (NaNd)(MgW)O6 | Zendy

Mark W. Licurse | Zendy; Peter K. Davies | Zendy

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Nanocheckerboard modulations in (NaNd)(MgW)O6

Author(s) -

Mark W. Licurse,

Peter K. Davies

Publication year - 2010

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.3490637

Subject(s) - nand gate , supercell , impurity , crystallography , lattice (music) , modulation (music) , materials science , condensed matter physics , perovskite (structure) , superlattice , physics , chemistry , mathematics , logic gate , thunderstorm , algorithm , meteorology , acoustics , quantum mechanics

Data is presented for a complex structural and compositional modulation in the perovskite (NaNd)(MgW)O6. This modulation creates a large 14ap×14ap×2ap supercell (ap≈3.9 A is the lattice parameter of the cubic perovskite aristotype) containing ordered regions with doubled (110) d-spacings in the a-b plane separated by two-dimensional periodic antiphase boundaries and accompanied by a nanocheckerboard pattern. Faint periodic modulations in Z-contrast images suggest an associated periodic variation in composition. The presence of a sodium rich impurity implies the composition of the stable perovskite is nonstoichiometric.

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