title: Interfacial exchange coupling and magnetization reversal in perpendicular [Co/Ni]N/TbCo composite structures.
abstract: Interfacial exchange coupling and magnetization reversal characteristics in the perpendicular heterostructures consisting of an amorphous ferrimagnetic (FI) TbxCo(100-x) alloy layer exchange-coupled with a ferromagnetic (FM) [Co/Ni]N multilayer have been investigated. As compared with pure TbxCo(100-x) alloy, the magnetization compensation composition of the heterostructures shift to a higher Tb content, implying Co/Ni also serves to compensate the Tb moment in TbCo layer. The net magnetization switching field Hc⊥ and interlayer interfacial coupling field Hex, are not only sensitive to the magnetization and thickness of the switched TbxCo(100-x) or [Co/Ni]N layer, but also to the perpendicular magnetic anisotropy strength of the pinning layer. By tuning the layer structure we achieve simultaneously both large Hc⊥ = 1.31 T and Hex = 2.19 T. These results, in addition to the fundamental interest, are important to understanding of the interfacial coupling interaction in the FM/FI heterostructures, which could offer the guiding of potential applications in heat-assisted magnetic recording or all-optical switching recording technique.
authors.affiliation: Shanghai Engineering Research Center of Ultra-precision Optical Manufacturing, and Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), Department of Optical Science and Engineering, Fudan University, Shanghai, 200433, China.
authors.forename: M H
authors.initials: MH
authors.lastname: Tang
authors.affiliation: Shanghai Engineering Research Center of Ultra-precision Optical Manufacturing, and Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), Department of Optical Science and Engineering, Fudan University, Shanghai, 200433, China.
authors.forename: Zongzhi
authors.initials: Z
authors.lastname: Zhang
authors.affiliation: Department of Physics, Ningbo University, Ningbo 315211, China.
authors.forename: S Y
authors.initials: SY
authors.lastname: Tian
authors.affiliation: Department of Physics, Ningbo University, Ningbo 315211, China.
authors.forename: J
authors.initials: J
authors.lastname: Wang
authors.affiliation: Shanghai Engineering Research Center of Ultra-precision Optical Manufacturing, and Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), Department of Optical Science and Engineering, Fudan University, Shanghai, 200433, China.
authors.forename: B
authors.initials: B
authors.lastname: Ma
authors.affiliation: Shanghai Engineering Research Center of Ultra-precision Optical Manufacturing, and Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), Department of Optical Science and Engineering, Fudan University, Shanghai, 200433, China.
authors.forename: Q Y
authors.initials: QY
authors.lastname: Jin