TY - JOUR
KW - Thin films
KW - Film
KW - Magnetic field
KW - Lattice constants
KW - Room temperature
KW - Thickness
KW - Crystal structure
KW - Polarization
KW - Ferroelectric materials
KW - Magnetism
KW - Article
KW - Priority journal
KW - Ferromagnetic materials
KW - X-ray Diffraction
KW - Calculation
KW - Structure analysis
KW - Heterojunctions
KW - Bismuth derivative
KW - Electric conductivity
KW - Semiconducting bismuth compounds
KW - Iron derivative
KW - Device infection
AU - J Wang
AU - J.B Neaton
AU - H Zheng
AU - V Nagarajan
AU - S.B Ogale
AU - B Liu
AU - D Viehland
AU - V Vaithyanathan
AU - D.G Schlom
AU - U.V Waghmare
AU - N.A Spaldin
AU - K.M Rabe
AU - M Wuttig
AU - Ramamoorthy Ramesh
AB - Enhancement of polarization and related properties in heteroepitaxially constrained thin films of the ferroelectromagnet, BiFeO3, is reported. Structure analysis indicates that the crystal structure of film is monoclinic in contrast to bulk, which is rhombohedral. The films display a room-temperature spontaneous polarization (50 to 60 microcoulombs per square centimeter) almost an order of magnitude higher than that of the bulk (6.1 microcoulombs per square centimeter). The observed enhancement is corroborated by first-principles calculations and found to originate from a high sensitivity of the polarization to small changes in lattice parameters. The films also exhibit enhanced thickness-dependent magnetism compared with the bulk. These enhanced and combined functional responses in thin film form present an opportunity to create and implement thin film devices that actively couple the magnetic and ferroelectric order parameters.
BT - Science
DO - 10.1126/science.1080615
LA - eng
M1 - 5613
N1 - cited By 4623
N2 - Enhancement of polarization and related properties in heteroepitaxially constrained thin films of the ferroelectromagnet, BiFeO3, is reported. Structure analysis indicates that the crystal structure of film is monoclinic in contrast to bulk, which is rhombohedral. The films display a room-temperature spontaneous polarization (50 to 60 microcoulombs per square centimeter) almost an order of magnitude higher than that of the bulk (6.1 microcoulombs per square centimeter). The observed enhancement is corroborated by first-principles calculations and found to originate from a high sensitivity of the polarization to small changes in lattice parameters. The films also exhibit enhanced thickness-dependent magnetism compared with the bulk. These enhanced and combined functional responses in thin film form present an opportunity to create and implement thin film devices that actively couple the magnetic and ferroelectric order parameters.
PY - 2003
SP - 1719
EP - 1722
T2 - Science
TI - Epitaxial BiFeO3 multiferroic thin film heterostructures
VL - 299
SN - 00368075
ER -