title: Gold nanotube encapsulation enhanced magnetic properties of transition metal monoatomic chains: An ab initio study.
abstract: The magnetic properties of gold nanotubes encapsulated transition metal (TM, TM=Co and Mn) and monoatomic chains (TM@Au) are studied using first-principles density functional calculations. The TM chains are significantly stabilized by the gold nanotube coating. TM-TM distance-dependent ferromagnetic-antiferromagnetic phase transition in TM@Au is observed and can be understood by Ruderman-Kittel-Kasuya-Yosida (RKKY) model. The magnetocrystalline anisotropy energies of the TM@Au tubes are dramatically enhanced by one order of magnitude compared to those of free TM chains. Furthermore, the stronger interaction between Mn chain and gold nanotube even switches the easy magnetization axis along the tube.
authors.affiliation: Department of Physics, Southeast University, Nanjing 211189, China.
authors.forename: Liyan
authors.initials: L
authors.lastname: Zhu
authors.forename: Jinlan
authors.initials: J
authors.lastname: Wang
authors.forename: Feng
authors.initials: F
authors.lastname: Ding