منابع مشابه
Crystal and magnetic structures of hexagonal YMnO3.
The available data on the structural and magnetic transitions in multiferroic hexagonal YMnO3 have been reviewed, first making use of the computer programs from the group theoretical ISOTROPY software suite to list possible crystal and magnetic structures, then taking into account the capability of neutron diffraction and other physical methods to distinguish them. This leads to a clear view of...
متن کاملThe effect of Coulomb correlation and magnetic ordering on the electronic structure of two hexagonal phases of ferroelectromagnetic YMnO3
The electronic structure of YMnO3 in its highand low-temperature hexagonal phases has been investigated within the local spin-density approximation (LSDA) and by the LSDA + U method which takes into account the local Coulomb interaction between d electrons of transitionmetal ions. In contrast to the case for orthorhombic manganites, the d4-configuration degeneracy is already lifted in the high-...
متن کاملStructural coherence and ferroelectric order in nanosized multiferroic YMnO3
S. Tripathi,1 V. Petkov,1,* S. M. Selbach,2 K. Bergum,2 M.-A. Einarsrud,2 T. Grande,2 and Y. Ren3 1Department of Physics, Central Michigan University, Mt. Pleasant, Michigan 48859, USA 2Department of Materials Science and Engineering, Norwegian University of Science and Technology, 7491 Trondheim, Norway 3Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, USA (Receive...
متن کاملDirect Observation of Multiferroic Vortex Domains in YMnO3
Topological vortices with swirling ferroelectric, magnetic and structural anti-phase relationship in hexagonal RMnO3 (R = Ho to Lu, Y, and Sc) have attracted much attention because of their intriguing behaviors. Herein, we report the structure of multiferroic vortex domains in YMnO3 at atomic scale using state-of-the-art aberration-corrected scanning transmission electron microscopy (STEM). Two...
متن کاملSynthesis, structure and magnetic properties of nanocrystalline YMnO3.
Nanocrystalline YMnO(3) has been prepared by wet chemical synthesis routes to obtain crystallites with sizes from 20 nm to bulk material. The crystal structure of hexagonal YMnO(3) nanocrystallites smaller than 80 nm deviates from bulk material in terms of unit cell distortion and unit cell volume. The ferrielectric displacements of Y(3+) cations along the polar c-axis decays progressively with...
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ژورنال
عنوان ژورنال: Acta Crystallographica Section C Crystal Structure Communications
سال: 2001
ISSN: 0108-2701
DOI: 10.1107/s0108270100015663