Revealing the low-temperature effect of strengthening the magnetism of iron-vanadium-aluminum alloy upon small variation of the non-transition element content in the stoichiometric composition

摘要

Anomalously strong change of ferromagnetic ordering parameters upon a small variation of aluminum content was revealed in low-temperature experimental studies of electrical resistivity and galvanomagnetic properties of iron-vanadium-aluminum magnetic alloys with the compositions near the stoichiometric Fe2VAl. By comparing the temperature and magnetic field dependences of the electrical resistivity and Hall effect in Fe2.1V0.91Al0.99 and Fe2.05V0.91Al1.04 alloys, it was shown that a small increase of aluminum content leads to doubling of the Curie temperature and a sharp change in the temperature dependences of the magnetoresistance and saturation of the spontaneous magnetization. (C) 2016 AIP Publishing LLC.