TY - JOUR
KW - Calcium
KW - Manganese oxide
KW - Electric fields
KW - Manganese
KW - Ferromagnetism
KW - Ferroelectric polarization
KW - Interfacial couplings
KW - Antiferromagnetism
KW - X-ray magnetic circular dichroism
KW - X-ray absorption spectroscopy
KW - Magnetic phase transitions
KW - Magnetoelectric couplings
KW - Manganites
KW - Ferromagnetic and anti-ferromagnetic
KW - Half-doped manganites
KW - X-ray absorption spectrum
KW - Electromagnetic coupling
KW - Magnetic couplings
KW - Mean field theory
AU - D Yi
AU - J F Liu
AU - S Okamoto
AU - S Jagannatha
AU - Y.-C Chen
AU - P Yu
AU - Y.-H Chu
AU - E Arenholz
AU - Ramamoorthy Ramesh
AB - We investigate the possibility of controlling the magnetic phase transition of the heterointerface between a half-doped manganite La0.5Ca 0.5MnO3 and a multiferroic BiFeO3 (BFO) through magnetoelectric coupling. Using macroscopic magnetometry and element-selective x-ray magnetic circular dichroism at the Mn and Fe L edges, we discover that the ferroelectric polarization of BFO controls simultaneously the magnetization of BFO and La0.5Ca0.5MnO3 (LCMO). X-ray absorption spectra at the oxygen K edge and linear dichroism at the Mn L edge suggest that the interfacial coupling is mainly derived from the superexchange between Mn and Fe t2g spins. The combination of x-ray absorption spectroscopy and mean-field theory calculations reveals that the d-electron modulation of Mn cations changes the magnetic coupling in LCMO, which controls the enhanced canted moments of interfacial BFO via the interfacial coupling. Our results demonstrate that the competition between ferromagnetic and antiferromagnetic instability can be modulated by an electric field at the heterointerface, providing another pathway for the electrical field control of magnetism. © 2013 American Physical Society.
BT - Physical Review Letters
DO - 10.1103/PhysRevLett.111.127601
LA - eng
M1 - 12
N1 - cited By 68
N2 - We investigate the possibility of controlling the magnetic phase transition of the heterointerface between a half-doped manganite La0.5Ca 0.5MnO3 and a multiferroic BiFeO3 (BFO) through magnetoelectric coupling. Using macroscopic magnetometry and element-selective x-ray magnetic circular dichroism at the Mn and Fe L edges, we discover that the ferroelectric polarization of BFO controls simultaneously the magnetization of BFO and La0.5Ca0.5MnO3 (LCMO). X-ray absorption spectra at the oxygen K edge and linear dichroism at the Mn L edge suggest that the interfacial coupling is mainly derived from the superexchange between Mn and Fe t2g spins. The combination of x-ray absorption spectroscopy and mean-field theory calculations reveals that the d-electron modulation of Mn cations changes the magnetic coupling in LCMO, which controls the enhanced canted moments of interfacial BFO via the interfacial coupling. Our results demonstrate that the competition between ferromagnetic and antiferromagnetic instability can be modulated by an electric field at the heterointerface, providing another pathway for the electrical field control of magnetism. © 2013 American Physical Society.
PY - 2013
T2 - Physical Review Letters
TI - Tuning the competition between ferromagnetism and antiferromagnetism in a half-doped manganite through magnetoelectric coupling
VL - 111
SN - 00319007
ER -