2007/10/10 by H. Bea, H. Béa, Manuel Bibès +13 · 3 citations
Materials Science · Physics and Astronomy · #Antiferromagnetism #Condensed matter physics #Exchange bias #Ferroelectric and Piezoelectric Materials #Ferroelectricity #Ferromagnetism #Magnetic and transport properties of perovskites and related materials #Magnetic anisotropy #Magnetic field #Magnetization #Materials science #Multiferroics #Multiferroics and related materials #Neutron reflectometry #Neutron scattering #Nuclear magnetic resonance #Optics #Optoelectronics #Physics #Piezoresponse force microscopy #Quantum mechanics #Scattering #Small-angle neutron scattering #Spins #cond-mat.mtrl-sci #cond-mat.str-el
paper · pdf · doi:10.1103/physrevlett.100.017204
submitted to Phys. Rev. Lett
arxiv created 2007/10/10 · openalex publication_date 2008/01/09 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We have combined neutron scattering and piezoresponse force microscopy to show that the exchange field in CoFeB/BiFeO3 heterostructures scales with the inverse of the ferroelectric and antiferromagnetic domain size of the BiFeO3 films, as expected from Malozemoff's model of exchange bias extended to multiferroics. Accordingly, polarized neutron reflectometry reveals the presence of uncompensated spins in the BiFeO3 film at the interface with CoFeB. In view of these results, we discuss possible strategies to switch the magnetization of a ferromagnet by an electric field using BiFeO3.