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Study on spin-splitting phenomena in the band structure of GdN
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View: Figures


Image of FIG. 1.
FIG. 1.

(a) Temperature dependent optical absorbance spectra for AlN/GdN/AlN heterostructure. (b) Tauc plots for AlN/GdN/AlN heterostructure. The inset is the magnification part of the optical band gaps for the minority and majority energies were presented. The spin splitting has been clearly visualized below 30 K.

Image of FIG. 2.
FIG. 2.

Optical direct band gaps of the 68 nm thin GdN film in the range of 3 K to 300 K. Optical band gaps of the minority and majority spin band energies are indicated in blue and green colors. Without applying magnetic field, an exceptional spin splitting below its Curie point have been prevailed.

Image of FIG. 3.
FIG. 3.

(a) Temperature dependent magnetization measured at different magnetic field intensities from 1 to 100 mT for 68 nm thin GdN. (b) The Arrott plots (M2 versus B/M) are used to obtain Tc for 68 nm thin GdN at different temperatures, and the Tc is projected to be 32 K. (c)–(d) The magnetic hysteresis loop for 68 nm thin 68 nm film at 4.2 and 30 K when the external magnetic field is in parallel with the sample surface. The observation of hysteresis loop indicates robust ferromagnetism at 4.2 K and soft ferromagnetic at 30 K.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Study on spin-splitting phenomena in the band structure of GdN