title: Simultaneous laser excitation of backward volume and perpendicular standing spin waves in full-Heusler Co2FeAl0.5Si0.5films.
abstract: Spin-wave dynamics in full-Heusler Co2FeAl0.5Si0.5films are studied using all-optical pump-probe magneto-optical polar Kerr spectroscopy. Backward volume magnetostatic spin-wave (BVMSW) mode is observed in films with thickness ranging from 20 to 100 nm besides perpendicular standing spin-wave (PSSW) mode, and found to be excited more efficiently than the PSSW mode. The field dependence of the effective Gilbert damping parameter appears especial extrinsic origin. The relationship between the lifetime and the group velocity of BVMSW mode is revealed. The frequency of BVMSW mode does not obviously depend on the film thickness, but the lifetime and the effective damping appear to do so. The simultaneous excitation of BVMSW and PSSW in Heusler alloy films as well as the characterization of their dynamic behaviors may be of interest for magnonic and spintronic applications.
authors.affiliation: State-Key Laboratory of Optoelectronic Materials and Technologies, School of Physics, Sun Yat-Sen University, Guangzhou, Guangdong 510275, P. R. China.|School of Physics and Electronic Engineering, Guangzhou University, Guangzhou, Guangdong 510006, P. R. China.
authors.forename: Zhifeng
authors.initials: Z
authors.lastname: Chen
authors.affiliation: State-Key Laboratory of Optoelectronic Materials and Technologies, School of Physics, Sun Yat-Sen University, Guangzhou, Guangdong 510275, P. R. China.
authors.forename: Yong
authors.initials: Y
authors.lastname: Yan
authors.affiliation: State-Key Laboratory of Optoelectronic Materials and Technologies, School of Physics, Sun Yat-Sen University, Guangzhou, Guangdong 510275, P. R. China.
authors.forename: Shufa
authors.initials: S
authors.lastname: Li
authors.affiliation: School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, P. R. China.
authors.forename: Xiaoguang
authors.initials: X
authors.lastname: Xu
authors.affiliation: School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, P. R. China.
authors.forename: Yong
authors.initials: Y
authors.lastname: Jiang
authors.affiliation: State-Key Laboratory of Optoelectronic Materials and Technologies, School of Physics, Sun Yat-Sen University, Guangzhou, Guangdong 510275, P. R. China.
authors.forename: Tianshu
authors.initials: T
authors.lastname: Lai