Magnetic properties and magnetocaloric effect in Gd(Ni1−xCox)3 intermetallic compounds

Influence of Transition Metal Substitution on the Low-Field Magnetic Properties in the Gd(Ni1-xTx)3 (T = Fe, Co) Intermetallic Compounds

“…The Curie temperatures for x ¤ 0.2 are defined at the maximum of |dM{dT|. The values of T C estimated at µ 0 H DC 10 Oe and µ 0 H AC 0 T modes are close to those previously obtained at 1000 Oe [8][9][10][11]. The change of T C values with increasing the T content is larger in the case of Fe compounds.…”

“…However, like in the RPdIn systems (R = Tb-Er) in low temperature range antifferomagnetic interactions are dominant and anisotropy field is more important than coercivity field [14]. In our latter studies we have shown quite strong influence of the electronic structure of the substituted elements Ni/T where T = Co, Fe on the magnetic properties in the investigated compounds [1,8,11]. In the case of T = Fe the exchange splitting of 3d band was visible for Ni and Fe-rich concentration [1,8].…”

“…For the same cobalt concentration T C varies more slowly. The T C pxq dependence strongly depends on the electronic structure and filling of the 3d band [9,10] and can be explained similarly to other RT 3 series on the basis of the rigid band model [1,2,[8][9][10][11]. For higher x there is visible additional in the vicinity of T C .…”

“…Partially replacing of Ni atoms by other 3d elements leads to changes in magnetic properties correlated with the electronic structure [1][2][3][4][5][6][7]. One of previously studied series is Gd(Ni 1¡x T x q 3 , where T = Fe or Co [5,[8][9][10][11]. The doping in the 3d sublattice the same amount of Co or Fe with different ionic radius (Fe -0.77 Å, Co -0.74 Å) and different number of 3d electrons (Fe -3d 6 , Co -3d 7 q causes appearing of different local environment of R atoms.…”

“…The doping in the 3d sublattice the same amount of Co or Fe with different ionic radius (Fe -0.77 Å, Co -0.74 Å) and different number of 3d electrons (Fe -3d 6 , Co -3d 7 q causes appearing of different local environment of R atoms. It is reflected in the change of: the volume of the unit cell, the Curie temperature, the saturation magnetization, the magnetization on 3d atom, the magnetocaloric effect (MCE) and the intensity of states at the Fermi level [8][9][10][11].…”