Camacho-Berríos, Adrián A.

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Estudio de dicroismo circular magnetico en el sistema ZnO1−xCoxO
(2011) Camacho-Berríos, Adrián A.; Jiménez-González, Héctor J.; College of Arts and Science - Science; Fernández, Félix E.; Radovan, Henri A.; Department of Physics; Valentín, Ricky
We studied the magnetic circular dichroism spectra (MCD) of ZnO1−xCoxO (x = 0.00, x = 0.05 and x = 0.01) thin films. No magneto-optical effect was observed in the ZnO sample, while samples of ZnO:Co 5% and ZnO:Co 10% MCD was observed in the region of 360 < λ < 450 nm which is close to the forbidden energy gap of semiconductor ZnO. In studying the MCD as a function of magnetic field curves were obtained with hysteresis loops which were modeled with the function A∗tanh(B∗(x−C))+D∗x−E. With the results we approached the values of saturation level, the remanent magnetization and coercivity of the samples. As a result we find that these physical quantities tend to decrease with temperature, as expected, confirming that the MCD is observed as a function of applied magnetic field.