Title :
Polarized Neutron Reflectivity Investigation of Periodic Magnetic Rings
Author :
Ogrin, F.Y. ; Weekes, S.M. ; Cubitt, B. ; Wildes, A. ; Drew, A. ; Ross, C.A. ; Jung, W. ; Menon, R. ; Toperverg, B.
Author_Institution :
Sch. of Phys., Exeter Univ.
fDate :
6/1/2007 12:00:00 AM
Abstract :
Magnetic ring structures are of particular interest, due to stable remanent configurations such as the vortex state, which have potential in future magnetic random access memory (MRAM) applications. Here we report results on the first experimental study of periodic ring arrays using off-specular polarized neutron reflectivity (PNR). The experiments were performed on a 7.5 mmtimes5 mm NiFe array with an average ring diameter of 3.2 mum, 0.7 mum width, 25 nm thickness, and separation of 5.6 mum. Using polarization analysis, a spin dependent diffraction of reflected and transmitted neutron beams were investigated as a function of external applied field
Keywords :
iron alloys; magnetic devices; magnetic domains; magnetic separation; neutron reflection; nickel alloys; random-access storage; 0.7 micron; 25 nm; 3.2 micron; 5 mm; 7.5 mm; NiFe; magnetic random access memory; magnetic ring structures; off-specular polarized neutron reflectivity; periodic magnetic rings; periodic ring arrays; polarized neutron reflectivity; reflected neutron beams; spin dependent diffraction; transmitted neutron beams; vortex state; Diffraction; Magnetic anisotropy; Magnetic domains; Magnetic separation; Magnetization; Materials science and technology; Neutrons; Physics; Polarization; Reflectivity; Magnetic domains; magnetization reversal; polarized neutron reflectivity;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2007.893525
