Open AccessСтруктурные, магнитные и тепловые свойства соединения Tb-=SUB=-0.8-=/SUB=-Sm-=SUB=-0.2-=/SUB=-Fe-=SUB=-2-=/SUB=- cо структурой фаз Лавеса
Author(s) -
T. A. Aleroeva,
И. С. Терешина,
Т.П. Каминская,
Z. S. Umkhaeva,
A. V. Filimonov,
П.Ю. Ванина,
О. А. Алексеева,
А.С. Илюшин
Publication year - 2019
Publication title -
fizika tverdogo tela
Language(s) - English
Resource type - Journals
eISSN - 1726-7498
pISSN - 0367-3294
DOI - 10.21883/ftt.2019.12.48603.551
Subject(s) - magnetostriction , curie temperature , materials science , atmospheric temperature range , thermal expansion , condensed matter physics , diffraction , thermal , magnetic field , analytical chemistry (journal) , ferromagnetism , thermodynamics , metallurgy , chemistry , physics , optics , chromatography , quantum mechanics
A comprehensive study of the structure, phase composition, features of the surface topology,the magnetostrictive and thermal properties of the Tb0.8Sm0.2Fe2 compound are performed. The structural features were established at micro- and nanoscale levels, and information on the magnetic domains structure at room temperature was obtained. The results of x-ray diffraction studies in a wide temperature range of 90–760 K, including Curie temperature, are represented. Experimental data on thermal expansion and magnetostriction in magnetic fields up to 12 kOe were obtained and analyzed. Anomalies were found in the thermal expansion curves dl/l (T) and magnetostriction λ (T) at low temperatures. It is established that in compound under study the value of the magnetostrictive effect remains almost unchanged in a wide temperature range 100–300 K in fields up to 3.5 kOe.