Abstract

The mesostructure of Mn_1 – xFe_x Ge transition-metal monogermanides is studied by small-angle neutron scattering (SANS) and ultra-SANS in a wide concentration range of x = 0.0–1.0.It is shown that the main contribution to the scattering intensity for all concentrations x is made by scattering at crystallites with sharp boundaries and sizes of 1–10 μm, which is described by the squared Lorentzian function. An additional contribution to the scattering intensity as a result of scattering at an ensemble of defects is found as well, which is characteristic of manganese-rich samples. This contribution is well fitted by the power function Q^–n with the exponent n = 3. The complementary scattering typical of iron-rich samples is described by an exponential function and also seems to be a part of scattering at sharp-boundary crystallites.

中文翻译：

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高压合成的Mn 1-x Fe x Ge化合物的缺陷性质

摘要

通过小角度中子散射（SANS）和超SANS研究了Mn _{1 –  x} Fe _x Ge过渡金属单锗化物的介孔结构，其广泛的浓度范围是x = 0.0–1.0。所有浓度x的散射强度是通过在具有清晰边界且尺寸为1–10μm的微晶处散射而得出的，这由平方洛伦兹函数描述。还发现了由于在缺陷集合处的散射而对散射强度的另一贡献，这是富锰样品的特征。幂函数Q ^–n与指数n很好地拟合了这一贡献 =3。富铁样品的典型互补散射由指数函数描述，并且似乎也是尖晶石微晶散射的一部分。