Magnetic waveguides for neutron reflectometry
Artikel i vetenskaplig tidskrift, 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.

Författare

Y. N. Khaydukov

A. M. Petrzhik

I. V. Borisenko

Alexei Kalaboukhov

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

Dag Winkler

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

T. Keller

Gennady Ovsyannikov

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

B. Keimer

Physical Review B

2469-9950 (ISSN)

Vol. 96 16

Ämneskategorier

Acceleratorfysik och instrumentering

Annan fysik

Den kondenserade materiens fysik

DOI

10.1103/PhysRevB.96.165414