What is the most efficient non-optical method to excite spin-wave?

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Fritz Caspers

As for the structures you mentioned its not so easy to excite spin waves. But you may use a small sphere if YIG and drive it into saturation..thats a nice way to get spin waves in the microwave range; as for the structure you mentioned (microstrip etc) well yes of ferrimagnetic substrate

perhaps you have some setup for magneto-static waves in mind .. this is an interesting but these days nearly forgotten field..you can find details on the web or I can send some refs. What is your application?

Anirban Mukhopadhyay

Thanks for your comment. I have excited MSSW in ferrite film via a microstrip line, i.e., using electrical transmission spin-wave microscopy. However, the weak spin-wave transmission signal is getting masked by the electromagnetic transmission between two microstrip antennas. So, I want to understand which micro-wave method will be best for exciting magnetostatic spin-wave.