TY - JOUR
KW - Electric potential
KW - Film
KW - Spectroscopy
KW - Resonance
KW - Anisotropy
KW - Iron
KW - Scanning electron microscopy
KW - Imaging
KW - Hysteresis
KW - Polarization
KW - Electric field
KW - Article
KW - Magnetization
KW - Bismuth
KW - Cobalt
KW - Electromagnetic field
KW - Bismuth derivative
KW - Electron spin resonance
KW - Ferromagnetic resonance spectroscopy
KW - Nanoanalysis
KW - Strength
KW - Surface property
AU - Z Zhou
AU - M Trassin
AU - Yuan Gao
AU - Yuan Gao
AU - D Qiu
AU - K Ashraf
AU - T Nan
AU - X Yang
AU - S.R Bowden
AU - D.T Pierce
AU - M.D Stiles
AU - J Unguris
AU - M Liu
AU - B.M Howe
AU - G.J Brown
AU - S Salahuddin
AU - Ramamoorthy Ramesh
AU - N.X Sun
AB - Exchange coupled CoFe/BiFeO3 thin-film heterostructures show great promise for power-efficient electric field-induced 180° magnetization switching. However, the coupling mechanism and precise qualification of the exchange coupling in CoFe/BiFeO3 heterostructures have been elusive. Here we show direct evidence for electric field control of the magnetic state in exchange coupled CoFe/BiFeO3 through electric field-dependent ferromagnetic resonance spectroscopy and nanoscale spatially resolved magnetic imaging. Scanning electron microscopy with polarization analysis images reveal the coupling of the magnetization in the CoFe layer to the canted moment in the BiFeO3 layer. Electric field-dependent ferromagnetic resonance measurements quantify the exchange coupling strength and reveal that the CoFe magnetization is directly and reversibly modulated by the applied electric field through a ∼180° switching of the canted moment in BiFeO3. This constitutes an important step towards robust repeatable and non-volatile voltage-induced 180° magnetization switching in thin-film multiferroic heterostructures and tunable RF/microwave devices. © 2015 Macmillan Publishers Limited. All rights reserved.
BT - Nature Communications
DO - 10.1038/ncomms7082
LA - eng
N1 - cited By 48
N2 - Exchange coupled CoFe/BiFeO3 thin-film heterostructures show great promise for power-efficient electric field-induced 180° magnetization switching. However, the coupling mechanism and precise qualification of the exchange coupling in CoFe/BiFeO3 heterostructures have been elusive. Here we show direct evidence for electric field control of the magnetic state in exchange coupled CoFe/BiFeO3 through electric field-dependent ferromagnetic resonance spectroscopy and nanoscale spatially resolved magnetic imaging. Scanning electron microscopy with polarization analysis images reveal the coupling of the magnetization in the CoFe layer to the canted moment in the BiFeO3 layer. Electric field-dependent ferromagnetic resonance measurements quantify the exchange coupling strength and reveal that the CoFe magnetization is directly and reversibly modulated by the applied electric field through a ∼180° switching of the canted moment in BiFeO3. This constitutes an important step towards robust repeatable and non-volatile voltage-induced 180° magnetization switching in thin-film multiferroic heterostructures and tunable RF/microwave devices. © 2015 Macmillan Publishers Limited. All rights reserved.
PB - Nature Publishing Group
PY - 2015
T2 - Nature Communications
TI - Probing electric field control of magnetism using ferromagnetic resonance
VL - 6
SN - 20411723
ER -