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在La(FeSi)_(13)基合金中加入少量间隙原子B后,分别以Co、Mn原子替代Fe原子,熔炼得到的合金样品再吸氢,利用X射线衍射物相分析(XRD)和振动样品磁强计(VSM)测量合金吸氢前后的相结构和磁性能。研究表明,用Co替代Fe原子后,La(FeSi)_(13)B_(0.2)合金的居里温度Tc提高,用Mn替代Fe原子后,La(FeSi)_(13)B_(0.1)合金的居里温度Tc会降低.两种替代都会使La(FeSi)_(13)B_x合金的等温磁熵变降低,但相对于金属Gd来说,其等温磁熵变还保持在一个相对较大的值。吸氢后添加Co和Mn的两种合金的居里温度Tc分别大幅度提升到378 K和279 K,而其等温磁熵变相对于吸氢前略微降低,分别降低为7.9 J/(kg·K)和6.9J/(kg·K)。
After adding a small amount of interstitial atoms B to La (FeSi) _ (13) based alloys, the Fe and Fe atoms were replaced by Co and Mn atoms, respectively. The alloy samples were then hydrogenated and characterized by X-ray diffraction (XRD) The sample magnetometer (VSM) measures the phase structure and magnetic properties of the alloy before and after hydrogen absorption. The results show that the Curie temperature Tc of La (FeSi) _ (13) B_ (0.2) alloy increases with the replacement of Fe atom by Co, and the La (FeSi) _13B_ (0.1) The Tc of Curie temperature decreases, both of them will decrease the isothermal magnetic entropy change of La (FeSi) _ (13) B_x alloy, but its isothermal magnetic entropy change remains relatively larger than that of Gd The value of. The Curie temperature Tc of the two alloys with addition of Co and Mn after hydrogen uptake increased to 378 K and 279 K, respectively, while the isothermal magnetic entropy change decreased slightly to 7.9 J / (kg · K ) And 6.9 J / (kg · K).