title: Electric tuning of magnetization dynamics and electric field-induced negative magnetic permeability in nanoscale composite multiferroics.
abstract: Steering magnetism by electric fields upon interfacing ferromagnetic (FM) and ferroelectric (FE) materials to achieve an emergent multiferroic response bears a great potential for nano-scale devices with novel functionalities. FM/FE heterostructures allow, for instance, the electrical manipulation of magnetic anisotropy via interfacial magnetoelectric (ME) couplings. A charge-mediated ME effect is believed to be generally weak and active in only a few angstroms. Here we present an experimental evidence uncovering a new magnon-driven, strong ME effect acting on the nanometer range. For Co92Zr8 (20 nm) film deposited on ferroelectric PMN-PT we show via ferromagnetic resonance (FMR) that this type of linear ME allows for electrical control of simultaneously the magnetization precession and its damping, both of which are key elements for magnetic switching and spintronics. The experiments unravel further an electric-field-induced negative magnetic permeability effect.
authors.affiliation: 1] Key Laboratory for Magnetism and Magnetic Materials of MOE, Lanzhou University, Lanzhou 730000, China [2] Institut für Physik, Martin-Luther Universität Halle-Wittenberg, 06099 Halle (Saale), Germany.
authors.forename: Chenglong
authors.initials: C
authors.lastname: Jia
authors.affiliation: Key Laboratory for Magnetism and Magnetic Materials of MOE, Lanzhou University, Lanzhou 730000, China.
authors.forename: Fenglong
authors.initials: F
authors.lastname: Wang
authors.affiliation: Key Laboratory for Magnetism and Magnetic Materials of MOE, Lanzhou University, Lanzhou 730000, China.
authors.forename: Changjun
authors.initials: C
authors.lastname: Jiang
authors.affiliation: Institut für Physik, Martin-Luther Universität Halle-Wittenberg, 06099 Halle (Saale), Germany.
authors.forename: Jamal
authors.initials: J
authors.lastname: Berakdar
authors.affiliation: Key Laboratory for Magnetism and Magnetic Materials of MOE, Lanzhou University, Lanzhou 730000, China.
authors.forename: Desheng
authors.initials: D
authors.lastname: Xue