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Magnetic waveguides for neutron reflectometry

Y. Khaydukov ; A. M. Petrzhik ; I. V. Borisenko ; Alexey Kalabukhov (Institutionen för mikroteknologi och nanovetenskap, Kvantkomponentfysik) ; Dag Winkler (Institutionen för mikroteknologi och nanovetenskap, Kvantkomponentfysik) ; T. Keller ; Gennady A. Ovsyannikov (Institutionen för mikroteknologi och nanovetenskap, Kvantkomponentfysik) ; B. Keimer
Physical Review B (2469-9950). Vol. 96 (2017), 16,
[Artikel, refereegranskad vetenskaplig]

We show that the sensitivity and depth selectivity of neutron reflectometry can be greatly enhanced through a waveguide design that takes advantage of the spin-dependent magnetic neutron scattering potential to steer spin-up and spin-down neutrons into waveguide modes with different depth profiles. Using a bilayer of manganate and ruthenate ferromagnets, we demonstrate that a magnetic waveguide structure with sharp spin-up and spin-down modes centered in the two different layers can be generated by adding a magnetically inactive capping layer. The resulting reflectometric data allow accurate and reliable determination of a small in-plane magnetization in the ruthenate layer, despite its immediate proximity to the manganate layer with much larger magnetization. Magnetic neutron waveguides thus enable depth-sensitive measurements of small electronic spin polarizations in a large variety of magnetic multilayers and devices.



Denna post skapades 2017-10-25.
CPL Pubid: 252767

 

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