title: Design of a vector magnet for the measurements of anisotropic magnetoresistance and rotational magneto-optic Kerr effect.
abstract: A vector magnet is designed and assembled with two electromagnets to produce a rotational magnetic field in any direction within a plane. This design allows a rotation of the magnetic field without a mechanical rotation of the magnets. The fast speed of the field rotation (~10 s for a complete 360° rotation) and the stability against mechanical vibration easily overcome the slow drifting effect in anisotropic magnetoresistance (AMR) and rotational magneto-optic Kerr effect (ROTMOKE) measurements. As an example we applied this vector magnet to carry out AMR and ROTMOKE measurements on epitaxial growth of Fe(10 nm)∕MgO(001) films. The result demonstrates the stability and high quality of the vector magnet in determining the magnetic anisotropy of magnetic thin films using AMR and ROTMOKE techniques.
authors.affiliation: Department of Physics, University of California at Berkeley, Berkeley, California 94720, USA.
authors.forename: J
authors.initials: J
authors.lastname: Li
authors.forename: E
authors.initials: E
authors.lastname: Jin
authors.forename: H
authors.initials: H
authors.lastname: Son
authors.forename: A
authors.initials: A
authors.lastname: Tan
authors.forename: W N
authors.initials: WN
authors.lastname: Cao
authors.forename: Chanyong
authors.initials: C
authors.lastname: Hwang
authors.forename: Z Q
authors.initials: ZQ
authors.lastname: Qiu