Split of the Magnetic and Crystallographic States in Fe1-Xrhxge

The hyperfine magnetic fields and the effect of high pressure on the magnetic transition temperatures of the noncentrosymmetric FeRhGe2 compound (B20)

“…For this compound the phase separation was not observed and its lattice parameter is larger than for FeGe [12]. The substitution of Fe by Rh in Fe 1−x Rh x Ge leads to the decrease of magnetic transition temperature [12]. This decrease in Fe 0.9 Rh 0.1 Ge is leveled out by P = 3 GPa when T c = 279 K, the same T c as in FeGe at P = 0 GPa [1].…”

“…For Fe 0.9 Rh 0.1 Ge external pressure initially leads to an increase in the temperature of the magnetic ordering of the helix T c , and as the pressure increases above 3 GPa, it leads to the decrease of T c . For this compound the phase separation was not observed and its lattice parameter is larger than for FeGe [12]. The substitution of Fe by Rh in Fe 1−x Rh x Ge leads to the decrease of magnetic transition temperature [12].…”

“…Previously it was shown that FeRhGe 2 has two magnetic transitions: the first at T c1 = 213 K (defined as the point of intersection with zero of the magnetic susceptibility) and the second at T c2 = 135 K (temperature at which the susceptibility is maximum) [12] (see figure 2(a)). These temperatures weakly depend on the external pressure in the range 0-4.3 GPa.…”

“…We also made ab initio calculations of single phases of FeRhGe 2 in paramagnetic and ferromagnetic states using the APW + lo method as implemented in the Wien2k package [20], with the PBE-GGA version of the exchange-correlation potential (see the details of the calculations in [12]).…”

“…The Fe 1−x Rh x Ge system has already been studied by means of x-ray diffraction (XRD), magnetic susceptibility measurements and small-angle neutron scattering [12]. It was shown that compounds with x = 0.3-0.9 are two-phases.…”