title: Domain wall tip for manipulation of magnetic particles.
abstract: We demonstrate a method for manipulation of single magnetic microparticles based on a domain wall tip displaced in a controlled manner. By applying an external magnetic field, the tip can either drag or push magnetic particles. This kind of tweezers has potential applications in probing and manipulating colloidal systems.
authors.affiliation: Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306-4390, USA.
authors.forename: L E
authors.initials: LE
authors.lastname: Helseth
authors.forename: T M
authors.initials: TM
authors.lastname: Fischer
authors.forename: T H
authors.initials: TH
authors.lastname: Johansen