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Author Arranz, Miguel A. ♦ Colino, José M.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ♦ ANISOTROPY ♦ BEAMS ♦ BIREFRINGENCE ♦ COBALT ♦ FILMS ♦ IONS ♦ MAGNETIC FIELDS ♦ MAGNETIZATION ♦ NANOSTRUCTURES ♦ NUCLEATION ♦ OPTICAL PROPERTIES ♦ ORIENTATION ♦ VISIBLE RADIATION
Abstract We report the measurement of magnetically induced birefringence in rippled Co films. For this purpose, the magneto-optical properties of ion beam eroded ferromagnetic films were studied using Kerr magnetometry and magnetic birefringence in the transmitted light intensity. Upon sufficient ion sculpting, these ripple surface nanostructures developed a defined uniaxial anisotropy in the in-plane magnetization, finely tuning the magnetic birefringence effect. We have studied its dependence on the relative orientation between the ripple direction and the magnetic field, and found this effect to be dramatically correlated with the capability to neatly distinguish the mechanisms for the in-plane magnetization reversal, i.e., rotation and nucleation. This double refraction corresponds univocally to the two magnetization axes, parallel and perpendicular to the ripples direction. We have also observed that tuned birefringence in stack assemblies of rippled Co films, which enables us to technically manipulate the number and direction of refraction axes.
ISSN 00036951
Educational Use Research
Learning Resource Type Article
Publisher Date 2015-06-22
Publisher Place United States
Journal Applied Physics Letters
Volume Number 106
Issue Number 25


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