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Home > Issues > SearchAC MOKE Measurements of Yttrium Iron Garnet Thin Films
Journal of Magnetics, Volume 23, Number 3, 30 Sep 2018, Pages 360-363
Ming Yau Chern * 
(Department of Physics, National Taiwan University), Wei Lun Xu (Department of Physics, National Taiwan University), Kung Yang (Department of Physics, National Taiwan University)
(Department of Physics, National Taiwan University), Wei Lun Xu (Department of Physics, National Taiwan University), Kung Yang (Department of Physics, National Taiwan University)
Abstract
The traditional magneto-optical Kerr effect (MOKE) measurements involve measuring the intensity of a light reflected off the samples subjected to a DC magnetic field. By superimposing an AC field to the sweeping DC
field, and measuring the AC component of the light intensity, we achieved a high signal-to-noise ratio and a better resolution in determining the Curie temperatures of magnetic samples. For a demonstration, we have determined the Curie temperature of a 350 nm thick YIG (yttrium iron garnet, Y3Fe5O12) thin film to be 511.0 +/− 0.5 K using this method.
field, and measuring the AC component of the light intensity, we achieved a high signal-to-noise ratio and a better resolution in determining the Curie temperatures of magnetic samples. For a demonstration, we have determined the Curie temperature of a 350 nm thick YIG (yttrium iron garnet, Y3Fe5O12) thin film to be 511.0 +/− 0.5 K using this method.
Keywords: MOKE; hysteresis; Curie temperature; AC; YIG; Y3Fe5O12
DOI: https://doi.org/10.4283/JMAG.2018.23.3.360
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