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Imaging and detection of periodic, 5-100 Hz magnetic fields with epitaxial rare earth-iron garnet films

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3 Author(s)
Hafez, J.M. ; Univ. of Illinois, Urbana ; Gao, J. ; Eden, J.G.

Sinusoidal magnetic fields with strengths as small as ~0.5 nT (RMS) and frequencies of 5 -100 Hz have been detected at room temperature by modulating the magneto-optical Kerr response of epitaxial rare earth-iron garnet films. Ferromagnetic nanoparticles with a mean size of 500 nm have also been detected in real time in a liquid flow stream at field strengths as low as 1 muT.

Published in:

Electronics Letters  (Volume:44 ,  Issue: 4 )