Numerical simulation of the lattice properties of Fe_1–xCo_xSi – strongly correlated electron systems

Abstract

Within the framework of a thermodynamic model, the phonon anharmonicity associated with both acoustic and optical vibrations of the crystal lattice is investigated. On this basis we have performed self‐consistent simulations of thermal and elastic properties of FeSi and CoSi compounds and their solid solutions Fe1–xCoxSi (x = 0.1, 0.3, 0.5), which are promising spintronic materials. The non‐lattice contributions to the heat capacity and coefficient of thermal expansion of the considered systems have been established. It is shown that the Invar effect observed in Fe0.7Co0.3Si and Fe0.5Co0.5Si is associated with anomalies of their electronic and magnetic subsystems.

Gd substitution induced incommensurate antiferromagnetism in B20 noncentrosymmetric CoSi

“…Though, there have been fair enough reports on doped MnSi and FeSi, a little research focus has been on to explore the properties of pure and doped CoSi for many years owing to its diamagnetic pseudo-gap semimetallic behaviour [5][6][7][8]. Experimental and theoretical investigations of Al, Ge and B doped CoSi i.e.…”

Magnetovolume effects and thermal expansion in chiral helical ferromagnets Fe-=SUB=-1-x-=/SUB=-Co-=SUB=-x-=/SUB=-Si

“…Figure 2. Temperature dependence of VCTE in alloy Fe 0.7 Co 0.3 Si:1nonframework contribution to VCTE produced in[11] after processing of experimental data, 2calculation in this paper. On the insert: temperature dependence of magnetization.…”