Iron 2 Yttrium iron garnet Yttrium iron garnets 2 Brain mapping 1 Channel arrays 1 Damping 1 Damping parameters 1 Effective damping 1 Effective damping parameter 1 Ferromagnetic materials 1 Ferromagnetic resonance 1 Ferromagnetism 1 Gadolinium gallium garnets 1 Gradiometer 1 MEG 1 Magnetic damping 1 Magnetoencephalography 1 Magnetometer sensors 1 Magnetometers 1 Metal bilayers 1 Multi channel 1 Multilayers 1 Noise levels 1 OPMs 1 Optically pumped 1 Optically pumped magnetometer 1 SNR 1 SQUID 1 SQUIDs 1 Shellfish 1