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Title: Ferroelectricity and magnetoelectric coupling in h-YbMnO{sub 3}: Spin reorientation and defect effect

Low-temperature magnetic and electric properties in hexagonal multiferroic compound YbMnO{sub 3} were studied. The Mn{sup 3+} spin moments order at T{sub N} = 85 K and reoriented around 43.5 K, leading to the magnetic phase transition from B{sub 2}(P6{sub 3}cm) → A{sub 2}(P6{sub 3}cm). The concomitant ferroelectric polarization is observed and explained microscopically by the destruction of initial symmetric relationship of the polarization between the upper and lower half of the magnetic unit cell. The asymmetry of the polarization vs temperature curves under opposite poling voltage revealed the pinning effect of the defects on the electrical polarization.
Authors:
; ; ; ;  [1]
  1. Materials Genome Institute and Department of Physics, Shanghai University, Shanghai 200444 (China)
Publication Date:
OSTI Identifier:
22489295
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 108; Journal Issue: 2; Other Information: (c) 2016 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ASYMMETRY; ELECTRIC POTENTIAL; ELECTRICAL PROPERTIES; FERROELECTRIC MATERIALS; HEXAGONAL LATTICES; MAGNETIC PROPERTIES; MANGANESE IONS; PHASE TRANSFORMATIONS; POLARIZATION; SPIN; SYMMETRY