The field dependence of Hall resistivity ρ_H and magnetization M of the magnetocaloric Ni₅₀Mn₃₅Sb_15−xGe_x (x = 0, 1, 3) alloys were measured at T = 4.2 K and in magnetic fields of up to 70 kOe. The martensitic transitions temperatures, i.e., the martensite start temperature M_S, martensite finish temperature M_F, austenite start A_S and austenite finish A_F temperatures, were obtained from the magnetization temperature dependence that measured from 4.2 to 350 K in a field of 1 kOe. It was observed that the martensitic transitions temperatures correlate strongly both with the valence electron concentration e/a and with the electronic transport characteristics, which are the coefficients of normal R₀ and anomalous R_S Hall effect and the concentration of charge carriers n. Apparently, similar correlations should be observed in other magnetocaloric compounds that could be used to study martensitic transitions.

中文翻译：

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Ni50Mn35Sb15-xGex（x = 0，1，3）合金的低温霍尔效应和马氏体转变温度

霍尔电阻率的场依赖性ρ _ħ和磁化中号的磁镍₅₀的Mn ₃₅的Sb _{15- X}葛_X（X  = 0，1，3）在测量合金Ť  = 4.2 K和在向上的磁场70奥斯特。马氏体转变温度，即，马氏体起始温度M _S，马氏体终点温度M _F，奥氏体起点A _S和奥氏体终点A _F。根据在1 kOe的磁场中从4.2到350 K测得的磁化温度相关性获得温度。观察到，马氏体转变温度与价电子浓度e / a和电子输运特性都密切相关，这些价电子是正态R ₀和反常R _S霍尔效应的系数以及电荷载流子的浓度n。显然，在其他可用于研究马氏体转变的磁热化合物中应观察到​​类似的相关性。