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Journal of Physical Studies 24(4), Article 4704 [4 pages] (2020)
DOI: https://doi.org/10.30970/jps.24.4704 THE Gd–Fe CONDENSED FILMS (STRUCTURE AND PROPERTIES)
V. Prysyazhnyuk
Ivan Franko National University of Lviv, Departments for Metal Physics,
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Amorphous films of compounds of the Gd-Fe system have been obtained using the method of thermal evaporation on fluoroplastic substrates. The substrate carrier temperature was 293 K. The increase in the temperature of substrates or annealing of films carrier lead to the increase in the amount of the polycrystalline phase. The width of explored films was 50-200 nanometers. The study of the structure of the films was made on electron microscope UEMV-100K with use of high-temperature attachment PRON-2. Magnetic measurements were made on a vibrational magnetometer. The field magnetization vector was parallel to a film plane. The peak saturating field was 300 kA/m. Structure and magnetic properties of films and bulk samples of the Gd-Fe system (GdFe$_2$, GdFe$_5$ and Gd$_2$Fe$_{17}$) were analyzed. Loops of magnetic hysteresis under the influence of a small external field were obtained. The value of the coercive force was measured. It decreases at the formation of an amorphous film in comparison with bulk samples.
Key words: Gd–Fe, binary compound, thin film, amorphous state, magnetic properties, coercive force, hysteresis curve
