Phase control of spin waves based on a magnetic defect in a one-dimensional magnonic crystal
Magnonic crystals are interesting for spin-wave based data processing. We investigate one-dimensional magnonic crystals (1D MCs) consisting of bistable Co20Fe60B20 nanostripes separated by 75 nm wide air gaps. By adjusting the magnetic history, we program a single stripe of opposed magnetization in an otherwise saturated 1D MC. Its influence on propagating spin waves is studied via broadband microwave spectroscopy. Depending on an in-plane bias magnetic field, we observe spin wave phase shifts of up to almost π and field-controlled attenuation attributed to the reversed nanostripe. Our findings are of importance for magnetologics, where the control of spin wave phases is essential.
Phase control of spin waves based on a magnetic defect in a one-dimensional magnonic crystal.pdf
openaccess
1.34 MB
Adobe PDF
982cf728505d79fed82316a06d3dcd5f
Supplement_PhaseControl_in_MagnonicCrystal_APL2018.pdf
openaccess
252.25 KB
Adobe PDF
043fb6eac985ed87a3f550b2b17bcad2