Open AccessPeculiarities of the electronic and magnetic characteristics in Co2 YSi (Y = Ti, V, Cr, Mn, Fe, Co, Ni) Heusler alloys close to the half-metallic ferromagnets and spin gapless semiconductors
Author(s) -
Yu. A. Perevozchikova,
А. А. Семянникова,
P. S. Korenistov,
В. В. Марченков
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1695/1/012143
Subject(s) - condensed matter physics , ferromagnetism , magnetization , materials science , hall effect , electrical resistivity and conductivity , heusler compound , electron , metal , saturation (graph theory) , magnetic field , physics , metallurgy , quantum mechanics , mathematics , combinatorics
The Hall Effect and magnetization of Heusler alloys Co2 Y Si ( Y = Ti, V, Cr, Mn, Fe, Co, Ni) were measured at T = 4.2 K and 300 K in magnetic fields of up to 100 kOe as well as the temperature dependence of the electroresistivity from 4.2 to 300 K. The normal and anomalous Hall coefficients, saturation magnetization, residual resistivity, type and concentration of current carriers and their mobility were obtained. It was demonstrated that there is a clear correlation between the electronic and magnetic parameters obtained, depending on the number of valence electrons z , at the transition from Co2TiSi ( z =26) to Co2NiSi ( z =32). The observed peculiarities of electronic and magnetic parameters may be due to the appearance of the states of the half-metallic ferromagnet and/or spin gapless semiconductor.