title: Capacitance effect on the oscillation and switching characteristics of spin torque oscillators.
abstract: We have studied the capacitance effect on the oscillation characteristics and the switching characteristics of the spin torque oscillators (STOs). We found that when the external field is applied, the STO oscillation frequency exhibits various dependences on the capacitance for injected current ranging from 8 to 20 mA. The switching characteristic is featured with the emerging of the canted region; the canted region increases with the capacitance. When the external field is absent, the STO free-layer switching time exhibits different dependences on the capacitance for different injected current. These results help to establish the foundation for capacitance-involved STO modeling.
authors.affiliation: Department of Electrical and Electronic Engineering, The University of Hong Kong, Pokfulam, Hong Kong.
authors.forename: Tui
authors.initials: T
authors.lastname: Zeng
authors.affiliation: Department of Physics, The University of Hong Kong, Pokfulam, Hong Kong.
authors.forename: Yan
authors.initials: Y
authors.lastname: Zhou
authors.affiliation: Department of Applied Physics, The Hong Kong Polytechnic University, Hung Hom, Hong Kong.
authors.forename: Chi Wah
authors.initials: CW
authors.lastname: Leung
authors.affiliation: Department of Electrical and Electronic Engineering, The University of Hong Kong, Pokfulam, Hong Kong.
authors.forename: Peter Pt
authors.initials: PP
authors.lastname: Lai
authors.affiliation: Department of Electrical and Electronic Engineering, The University of Hong Kong, Pokfulam, Hong Kong.
authors.forename: Philip Wt
authors.initials: PW
authors.lastname: Pong
keywords: Canted region; Capacitance effect; Oscillation frequency; Switching time