title: Tuning magnetic properties of antiferromagnetic chains by exchange interactions: ab initio studies.
abstract: The possibility of using exchange interactions to manipulate the spin state of an antiferromagnetic nanostructure is explored using ab initio calculations. By considering M (M = Mn, Fe, Co) mono-atomic chains supported on Cu2N islands on a Cu(001) surface as a model system, it is demonstrated that two indistinguishable Néel states of an antiferromagnetic chain can be tailored into a preferred state by the exchange interaction with a magnetic STM tip. The magnitude and direction of the anisotropy for antiferromagnetic chains can also be tuned by exchange coupling upon varying the tip-chain separation.
authors.affiliation: Key Lab for Magnetism and Magnetic Materials of Ministry of Education, Lanzhou University, Lanzhou 730000, People's Republic of China. taokun@lzu.edu.cn.
authors.forename: Kun
authors.initials: K
authors.lastname: Tao
authors.forename: Qing
authors.initials: Q
authors.lastname: Guo
authors.forename: Puru
authors.initials: P
authors.lastname: Jena
authors.forename: Desheng
authors.initials: D
authors.lastname: Xue
authors.forename: Valeri S
authors.initials: VS
authors.lastname: Stepanyuk