Magnetic waveguides for neutron reflectometry
Journal article, 2017

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.


Y. N. Khaydukov

A. M. Petrzhik

I. V. Borisenko

Alexei Kalaboukhov

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics

Dag Winkler

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics

T. Keller

Gennady Ovsyannikov

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics

B. Keimer

Physical Review B

2469-9950 (ISSN) 2469-9969 (eISSN)

Vol. 96 16

Subject Categories

Accelerator Physics and Instrumentation

Other Physics Topics

Condensed Matter Physics



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