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Abstract
The multicomponent Sm0.2(Tb,Y)0.8Fe2 system was obtained by the arc melting method, in which atoms with a high magnetic moment of terbium are replaced by yttrium atoms that do not carry a noticeable magnetic moment. In this system, varying not only the composition, but also external factors (temperature, magnetic field, etc.), it is possible to influence competing exchange interactions and observe a number of unique phenomena, such as, for example, the phenomenon of magnetic compensation. Using the method of high-temperature and low-temperature X-ray diffraction, the phase composition and atomic-crystalline structure of the Sm0.2(Tb1-xYx)0.8Fe2 alloys (x = 0, 0.2, 0.4, 0.6, 0.8, 1) were studied. The temperature dependences of the unit cell parameters were obtained in a wide temperature range from 80 to 700 K. Thermal expansion was investigated by strain-gauge method. The temperatures of magnetostructural phase transitions are determined, and a magnetic phase diagram is constructed.
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1 Baikov Institute of Metallurgy and Materials Science RAS, Moscow, 119334, Russia; Peter the Great St. Petersburg Polytechnic University, St. Petersburg, 195251, Russia
2 Peter the Great St. Petersburg Polytechnic University, St. Petersburg, 195251, Russia
3 Peter the Great St. Petersburg Polytechnic University, St. Petersburg, 195251, Russia; Alferov University, 194021 St. Petersburg, Russia
4 Lomonosov Moscow State University, Faculty of Physics, Moscow, 119991, Russia; Faculty of Physics, Chechen State University, 364024, Grozny, Russia
5 Lomonosov Moscow State University, Faculty of Physics, Moscow, 119991, Russia
6 Baikov Institute of Metallurgy and Materials Science RAS, Moscow, 119334, Russia
7 Lomonosov Moscow State University, Faculty of Physics, Moscow, 119991, Russia; Complex Research Institute Named After Kh. I. Ibragimov, RAS, 364906, Grozny, Russia