Abstract
We present experimental and theoretical results on the propagation of magnetostatic spin waves in a film of yttrium iron garnet (YIG) for out-of-plane magnetic fields for which propagation in opposite directions is nonreciprocal in the presence of a metal layer. The plane studied is defined by the film normal n and n × k where k is the wave vector of the mode. Spin waves in this setting are classified as forward volume waves or surface waves and display non-reciprocity in the presence of an adjacent metal layer except for when H//n. The measurements are carried out in a transmission geometry, and a microwave mixer is used to measure the change of phase, and with it the evolution of wavevector, of the arriving spin wave with external magnetic field.
Highlights
Long wavelength spin waves are magnetostatic in character and can be divided into two catagories: i) those where the static magnetic field, H, is parallel to the yttrium iron garnet (YIG) surface and ii) those where it has a non-vanishing perpendicular component
We have developed a theory for the propagation magnetostatic waves in the presence of a metal layer when static magnetic field lies in FV-DE plane
The yttrium iron garnet (YIG) film used in these experiments was grown epitaxially on a gadolinium gallium garnet (GGG) substrate and had a thickness is 9.72 μm
Summary
Long wavelength spin waves are magnetostatic in character and can be divided into two catagories: i) those where the static magnetic field, H, is parallel to the YIG surface (an in-plane geometry) and ii) those where it has a non-vanishing perpendicular component (an out-of-plane geometry). In the absence of a metal layer there is an exact solution in the magnetostatic limit for the DE1 and FV2 geometries, but not for intermediate angles. There have been studies of the non-reciprocity of the surface mode in the presence of a metal layer in the DE geometry,[3,4,5,6] but not at intermediate angles for FV-DE plane. We have developed a theory for the propagation magnetostatic waves in the presence of a metal layer when static magnetic field lies in FV-DE plane. We have compared the experimental and theoretical results and used them to determine an effective spacing between YIG film and metal (Cu) layer
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
