Enhanced Faraday rotation of cube-shaped EuS nanocrystals with a magnetic coercive field
نویسندگان
چکیده
Enhanced Faraday effect of cube-shaped EuS nanocrystals (average crystal size = 12 nm) with a coercive field is demonstrated for the fast time. The coercive field and the remanent magnetization of cube-shaped EuS nanocrystals were found to be 0.011 T and 0.05 μB, respectively, using a SQUID (superconducting quantum interface device). Consideration of the volume percentages of cube-shaped EuS nanocrystals in polymer thin film gives a large Verdet constant (0.071 deg/cm Oe), which is 3.7 times larger than that of the polymer thin films containing sphere-shaped EuS nanocrystals (average crystal size = 14 nm). Cube-shaped EuS nanocrystals with a coercive field are expected to be used as active magneto-optical materials.
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