Tuning the magnetic and structural properties of a three-metal boride alloy: Mn0.95−Fe1.05+−Co B
Tuning the magnetic and structural properties of a three-metal boride alloy: Mn0.95−Fe1.05+−Co B
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DOI：
10.1016/j.jallcom.2019.07.119
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发表时间：
2019-10
影响因子：
6.2
通讯作者：
M. Abramchuk;Thomas Mier;F. Tafti
中科院分区：
文献类型：
--
作者：
M. Abramchuk;Thomas Mier;F. Tafti
本文对电弧熔炼和退火合成的三金属硼化物合金Mn 0.95− δFe 1.05+ δ− x Co x B（δ= 0− 0.15和x= 0− 1.05）进行了全面的研究。该合金在与母体化合物Mn 2 B相同的空间群（I4/mcm）中以体心四面体晶胞结晶。铸态试样中有少量MB（M= Mn，Fe，Co）杂质生成，经酸处理后可去除。Rietveld精修的粉末X射线数据揭示了一个各向异性的晶格参数的变化系列。随着Co含量的增加，c轴增大，但a轴减小。磁测量结果表明，作为x的函数的Tc和饱和磁化强度Ms的非单调变化。这些发现突出了Mn 0.95− δ Fe 1.05+ δ− x Co x B的可调性质，并激发了对富金属硼化物合金的进一步研究。
We present a comprehensive study of the three-metal boride alloys Mn 0.95− δFe 1.05+ δ− x Co x B (δ= 0− 0.15 and x= 0− 1.05) synthesized via arc melting and annealing. The alloys crystallize in a body-centered tetragonal unit cell in the same space group (I 4/m c m) as the parent compound Mn 2 B. A small amount of MB (M= Mn, Fe, Co) impurity forms in the as-cast samples which is removed by acid treatment. Rietveld refinement on the powder X-ray data reveals an anisotropic variation of lattice parameters in the series. The c-axis increases with increasing Co content but the a-axis decreases. Magnetic measurements show a non-monotonic variation of both T c and the saturated magnetization M s as a function of x. These findings highlight the tunable nature of Mn 0.95− δ Fe 1.05+ δ− x Co x B and motivate further studies of metal-rich boride alloys.