TY - JOUR
KW - Electricity
KW - Temperature
KW - Room temperature
KW - Chemistry
KW - Electron microscopy
KW - Magnetism
KW - Materials testing
KW - Electric field
KW - Article
KW - Circular dichroism
KW - Bismuth
KW - Ferrite
KW - Ferric oxide
KW - Electromagnetic field
KW - Nanomaterial
KW - Ferric ion
KW - Ferric Compounds
KW - Magnetics
KW - Magnetite nanoparticle
KW - X-Ray
KW - Electron Probe Microanalysis
KW - Electromagnetic Phenomena
KW - Magnetite Nanoparticles
AU - Q He
AU - Y.-H Chu
AU - J.T Heron
AU - S.Y Yang
AU - W.I Liang
AU - C.Y Kuo
AU - H.J Lin
AU - P Yu
AU - C.W Liang
AU - R.J Zeches
AU - W.C Kuo
AU - J.Y Juang
AU - C.T Chen
AU - E Arenholz
AU - A Scholl
AU - Ramamoorthy Ramesh
AB - Magnetoelectrics and multiferroics present exciting opportunities for electric-field control of magnetism. However, there are few room-temperature ferromagnetic-ferroelectrics. Among the various types of multiferroics the bismuth ferrite system has received much attention primarily because both the ferroelectric and the antiferromagnetic orders are quite robust at room temperature. Here we demonstrate the emergence of an enhanced spontaneous magnetization in a strain-driven rhombohedral and super-tetragonal mixed phase of BiFeO 3. Using X-ray magnetic circular dichroism-based photoemission electron microscopy coupled with macroscopic magnetic measurements, we find that the spontaneous magnetization of the rhombohedral phase is significantly enhanced above the canted antiferromagnetic moment in the bulk phase, as a consequence of a piezomagnetic coupling to the adjacent tetragonal-like phase and the epitaxial constraint. Reversible electric-field control and manipulation of this magnetic moment at room temperature is also shown. © 2011 Macmillan Publishers Limited. All rights reserved.
BT - Nature Communications
DO - 10.1038/ncomms1221
LA - eng
M1 - 1
N1 - cited By 122
N2 - Magnetoelectrics and multiferroics present exciting opportunities for electric-field control of magnetism. However, there are few room-temperature ferromagnetic-ferroelectrics. Among the various types of multiferroics the bismuth ferrite system has received much attention primarily because both the ferroelectric and the antiferromagnetic orders are quite robust at room temperature. Here we demonstrate the emergence of an enhanced spontaneous magnetization in a strain-driven rhombohedral and super-tetragonal mixed phase of BiFeO 3. Using X-ray magnetic circular dichroism-based photoemission electron microscopy coupled with macroscopic magnetic measurements, we find that the spontaneous magnetization of the rhombohedral phase is significantly enhanced above the canted antiferromagnetic moment in the bulk phase, as a consequence of a piezomagnetic coupling to the adjacent tetragonal-like phase and the epitaxial constraint. Reversible electric-field control and manipulation of this magnetic moment at room temperature is also shown. © 2011 Macmillan Publishers Limited. All rights reserved.
PY - 2011
T2 - Nature Communications
TI - Electrically controllable spontaneous magnetism in nanoscale mixed phase multiferroics
VL - 2
SN - 20411723
ER -