Annual meeting of the Swiss Physical Society 2018

【835】 Direct observation of a tunable spin wave phase shift at a magnetic defect in a one-dimensional magnonic crystal

29 Aug 2018, 18:30

1h 30m

Salle polyvalente (EPFL)

Poster Magnetism and Spintronics at the Nanoscale Poster Session

Speaker

Korbinian Baumgaertl (SWITCH edu-ID)

Description

Magnonic crystals are interesting for spin-wave based data processing. We investigate one-dimensional magnonic crystals (1D MCs) consisting of bistable CoFeB 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 and phase-resolved Brillouin light scattering microscopy. Depending on an in-plane bias magnetic field, we observe spin wave phase shifts of up to π and field-controlled attenuation attributed to the reversed nanostripe. We thank for funding by SNSF via grant 163016.