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Title: Switching magnetization by 180° with an electric field. Author: Fechner M, Zahn P, Ostanin S, Bibes M, Mertig I. Journal: Phys Rev Lett; 2012 May 11; 108(19):197206. PubMed ID: 23003084. Abstract: Magnetoelectric coupling allows for manipulating the magnetization by an external electric field or the electrical polarization by an external magnetic field. Here, we propose a mechanism to electrically induce 180° magnetization switching combining two effects: the magnetoelectric coupling at a multiferroic interface and magnetic interlayer exchange coupling. By means of first-principles methods, we investigate a ferroelectric layer in contact with a Fe/Au/Fe trilayer. The calculations show that the interface magnetism is strongly coupled to the ferroelectric layer. Furthermore, under certain conditions a reversal of polarization causes a sign reversal of the interlayer exchange coupling which is results in a 180° switching of the free layer magnetization. We argue that this magnetoelectric coupling mechanism is very robust and can find applications in magnetic data storage.[Abstract] [Full Text] [Related] [New Search]