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On the Nature of Defects in Mn 1 – x Fe x Ge Compounds Synthesized under High Pressure
Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques ( IF 0.5 ) Pub Date : 2020-07-07 , DOI: 10.1134/s1027451020030209
E. G. Iashina , E. V. Altynbaev , L. N. Fomicheva , A. V. Tsvyashchenko , S. V. Grigoriev

Abstract

The mesostructure of Mn1 – xFex 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:

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。
更新日期:2020-07-07
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