title: Quadratic scaling of intrinsic Gilbert damping with spin-orbital coupling in L10 FePdPt films: experiments and Ab initio calculations.
abstract: The dependence of the intrinsic Gilbert damping parameter α(0) on the spin-orbital coupling strength ξ is investigated in L1(0) ordered FePd(1-x) Pt(x) films by time-resolved magneto-optical Kerr effect measurements and spin-dependent ab initio calculations. Continuous tuning of α(0) over more than one order of magnitude is realized by changing the Pt/Pd concentration ratio showing that α(0) is proportional to ξ(2) as changes of other leading parameters are found to be negligible. The perpendicular magnetic anisotropy is shown to have a similar variation trend with x. The present results may facilitate the design and fabrication of new magnetic alloys with large perpendicular magnetic anisotropy and tailored damping properties.
authors.affiliation: Surface Physics State Laboratory and Department of Physics, Fudan University, Shanghai 200433, China and Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology and School of Physics Science and Engineering, Tongji University, Shanghai 200092, China.
authors.forename: P
authors.initials: P
authors.lastname: He
authors.affiliation: Department of Applied Science, College of William and Mary, Williamsburg, Virginia 23185, USA.
authors.forename: X
authors.initials: X
authors.lastname: Ma
authors.affiliation: Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology and School of Physics Science and Engineering, Tongji University, Shanghai 200092, China.
authors.forename: J W
authors.initials: JW
authors.lastname: Zhang
authors.affiliation: Department of Applied Science, College of William and Mary, Williamsburg, Virginia 23185, USA and Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education) and Department of Optical Science and Engineering, Fudan University, Shanghai 200433, China.
authors.forename: H B
authors.initials: HB
authors.lastname: Zhao
authors.affiliation: Department of Applied Science, College of William and Mary, Williamsburg, Virginia 23185, USA.
authors.forename: G
authors.initials: G
authors.lastname: Lüpke
authors.affiliation: Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology and School of Physics Science and Engineering, Tongji University, Shanghai 200092, China.
authors.forename: Z
authors.initials: Z
authors.lastname: Shi
authors.affiliation: Surface Physics State Laboratory and Department of Physics, Fudan University, Shanghai 200433, China and Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology and School of Physics Science and Engineering, Tongji University, Shanghai 200092, China.
authors.forename: S M
authors.initials: SM
authors.lastname: Zhou