We discuss maximization of the sensitivity of magneto-optical detection of single nanomagnets. We show that a combination of optimized dielectric coating on the magnets with an antireflection coated substrate can increase the areal magneto-optic sensitivity by about three orders of magnitude in the deep nanometer range. A dual layer nanofabrication process is developed to implement this approach, and magnetization switching of single nickel nanomagnets with diameter is demonstrated.
Optimization of nano-magneto-optic sensitivity using dual dielectric layer enhancement
S. Wang, A. Barman, H. Schmidt, J. D. Maas, A. R. Hawkins, S. Kwon, B. Harteneck, S. Cabrini, J. Bokor; Optimization of nano-magneto-optic sensitivity using dual dielectric layer enhancement. Appl. Phys. Lett. 18 June 2007; 90 (25): 252504. https://doi.org/10.1063/1.2750389
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