首页> 外文期刊>Studia Universitatis Babes-Bolyai. Series Physica >CRYSTALLOGRAPHIC AND ELECTRONIC STRUCTUREOF Ni_(0.7-x)Al_xMn_(0.3)ALLOYS
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CRYSTALLOGRAPHIC AND ELECTRONIC STRUCTUREOF Ni_(0.7-x)Al_xMn_(0.3)ALLOYS

机译:Ni_(0.7-x)Al_xMn_(0.3)合金的晶体学和电子结构

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X-ray diffraction and photoelectron spectroscopy measurements ofNi_(0.7-x)Al_xMn_(0.3)(x=0.0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.7) alloys are reported. A change inthe crystallographic structure takes place around x=0.2 from AuCu_3to CsCl (B2)structure type. The decrease of the Ni 2p satellites as the Al concentration increases maybe explained by the hybridization of the Ni 3d and Al 3sp states, which leads to apartial filling of the Ni 3d band. The Ni 2p core level lines and the valence bandcentroids arc shifted towards higher binding energies and the density of states atFermi level decreases as the Al concentration increases, confirming the partial fillingof the Ni 3d band. XPS core-level spectra evidenced the existence of local magneticmoments confined at Mn sites,
机译:报道了Ni_(0.7-x)Al_xMn_(0.3)(x = 0.0,0.1,0.2,0.3,0.4,0.5,0.7)合金的X射线衍射和光电子能谱测量。从AuCu_3到CsCl(B2)结构类型,晶体结构发生了大约x = 0.2的变化。 Ni 2p卫星随Al浓度的增加而减少可能是由于Ni 3d和Al 3sp态的杂化,从而导致Ni 3d能带的局部填充。 Ni 2p核心能级线和价带质心向较高的结合能偏移,并且随着Al浓度的增加,费米能级的态密度减小,从而证实了Ni 3d能带的部分填充。 XPS核心能级谱证明存在局限在Mn位置的局部磁矩,

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