Influence of the substitution of Ni for Fe on the microstructure evolution and magnetic phase transition in La(Fe1−xNix)11.5Si1.5 compounds

Effect of Ga Addition on Structure and Magnetic Properties of the LaFe11.14Co0.66Si1.2-xGax(x=0.1, 0.2, 0.3) Alloys

“…In case of samples with x = 0.2 and 0.3, additional low intensity peaks were present. They might be attributed to La-rich phase as was suggested in other work [16]. However, single peaks corresponding to this phase cannot clearly prove its presence.…”

The influence of Cr and Ni on the character of magnetic phase transition in LaFe11.52-xMxSi1.48 alloys

“…2 The effect of Cr and Ni element substitution for Fe on the magnetocaloric effect has been studied. [8][9][10] The negative lattice expansion was observed in LaFe 11.14-x Co 0.66 Ni x Si 1.2 alloys. 8 Partial substitution of Ni for Fe in La(Fe 1-x Ni x ) 11.5 Si 1.5 alloys promote fining of the as-cast microstructure and the Curie temperature of La(Fe 1-x Ni x ) 11.5 Si 1.5 alloys increase with the increase of Ni.…”

“…8 Partial substitution of Ni for Fe in La(Fe 1-x Ni x ) 11.5 Si 1.5 alloys promote fining of the as-cast microstructure and the Curie temperature of La(Fe 1-x Ni x ) 11.5 Si 1.5 alloys increase with the increase of Ni. 9 Ni and Cr participated in peritectoid and slightly entered in 1:13 phase, which would cause the disappearance of first order magnetic phase transition. 10 In order to further understand the change of the nature of magnetic phase transition by element substitution, present paper investigated the phase formation, composition and magnetic properties for LaFe 11 Ni, 99.999% for Si.…”

Experimental Investigation of Isothermal Section in the La–Co–Ni System at 723 K

“…However, its phase transition temperature is around 200 K, so it is difficult to cool it at room temperature. The introduction of transition element Ni can effectively improve the stability of La(FeSi) 13 compounds, and Co can increase its magnetic phase transition temperature [6][7][8][9][10]. By optimizing the Fe/Co/Ni/Si ratio of the La(FeCoNiSi) 13 alloy, the magnetic phase transition temperature of the alloy can be adjusted to room temperature, which makes the application of magnetic refrigeration technology at room temperature very possible.…”