Fig. 1
From: Long-distance propagation of short-wavelength spin waves
Different magnetic states in a nanopatterned magnetic heterostructure. a Sketch of an YIG (20 nm)/Ti (1 nm)/Co (25 nm) heterostructure with a coplanar waveguide (CPW) prepared on the top. The applied field H is parallel to the Co nanowires (along the y axis). b Color-coded reflection spectra S11 measured on the device structure shown in a. The field is set to −3000 Oe to magnetize the Co nanowires and the YIG film to saturation first and then swept from −400 Oe to 400 Oe with a field step of 2.5 Oe. The spectra have several different regions corresponding to three different magnetic states: parallel state (P), antiparallel state (AP), and random state (R). c A line plot extracted from b at a field of 400 Oe. d Color-coded reflection spectra S11 with a reversed field sweeping direction, as indicated. The field is set to 3000 Oe first and then swept from 400 Oe to −400 Oe with a field step of −2.5 Oe. e TEM image of the YIG/Ti/Co heterostructure. The horizontal scale bar is 2 nm long. f SEM surface image of the heterostructure. The Co nanowires are color-coded in red and the YIG film beneath the wires are in blue. The scale bar is 500 nm long
