Features of the electroresistivity, magnetic and galvanomagnetic characteristicsin Co2MeSi Heusler alloys
V. V. Marchenkov1, 2, Yu. A. Perevozchikova1, A. A. Semiannikova1, P. S. Korenistov1, E. B. Marchenkova1, and A. N. Domozhirova1
1M. N. Mikheev Institute of Metal Physics of the Ural Branch of the Russian Academy of SciencesEkaterinburg 620108, Russia
2Ural Federal University, Ekaterinburg 620002, Russia
Received September 23, 2020, published online November 24, 2020
The electro- and magnetotransport as well as magnetic properties of Co2MeSi (Me = Ti, V, Cr, Mn, Fe, Co, Ni)Heusler alloys were studied. The electroresistivity was measured from 4.2 to 300 K, the galvanomagnetic properties (magnetoresistivity and Hall effect) were measured at T = 4.2 K in magnetic fields of up to 100 kOe, and the magnetization at T = 4.2 and 300 K in fields of up to 70 kOe. The normal and anomalous Hall coefficients, saturation magnetization, residual resistivity, current carrier concentration, coefficients at linear contributions into the electroresistivity and magnetoresistivity were obtained. It was shown that on the one hand, there is quite clear correlation between the electronic and magnetic characteristics of Heusler alloys studied, and the spin polarization coefficients of current carriers, taken from well know literature data, on the other hand. The obtained results can be used for creation of new materials for spintronics.
Key words: Heusler alloys, galvanomagnetic properties, spin polarization, spintronics.