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Ferroelectric Properties of Multiferroic Hexagonal ErMnO3 Thin Films
장승엽,Daesu Lee,Jung-Hyuk Lee,Pattukkannu Murugavel,정진석 한국물리학회 2009 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.55 No.2
The authors investigated the ferroelectric properties of epitaxial thin films of hexagonal ErMnO3 fabricated on Pt(111)/Al2O3(0001) substrates. The ferroelectric characteristics were observed with a reasonable remnant polarization value (3.0 μC/cm2 at 160 K). However, the films exhibited an unusual antiferroelectric-like behavior with a temperature- and an electric-field-dependence. The coercive field showed an abrupt increase below the antiferromagneitc ordering temperature, indicating the possibility of interference between ferroelectric domains and antiferromagnetic domains. The authors investigated the ferroelectric properties of epitaxial thin films of hexagonal ErMnO3 fabricated on Pt(111)/Al2O3(0001) substrates. The ferroelectric characteristics were observed with a reasonable remnant polarization value (3.0 μC/cm2 at 160 K). However, the films exhibited an unusual antiferroelectric-like behavior with a temperature- and an electric-field-dependence. The coercive field showed an abrupt increase below the antiferromagneitc ordering temperature, indicating the possibility of interference between ferroelectric domains and antiferromagnetic domains.