Geometric, electronic, and magnetic structure of Co2FeSi: Curie temperature and magnetic moment measurements and calculations

By S. Wurmehl, G. Fecher, H. Kandpal, V. Ksenofontov, Claudia Felser, Hong‐ji Lin, J. Morais. 2005

521 citations recorded by the source corpus.

In this work a simple concept was used for a systematic search for materials with high spin polarization. It is based on two semiempirical models. First, the Slater-Pauling rule was used for estimation of the magnetic moment. This model is well supported by electronic structure calculations. The second model was found particularly for Co{sub 2} based Heusler compounds when comparing their magnetic properties. It turned out that these compounds exhibit seemingly a linear dependence of the Curie temperature as function of the magnetic moment. Stimulated by these models, Co{sub 2}FeSi was revisited. The compound was investigated in detail concerning its geometrical and magnetic structure by means of x-ray diffraction, x-ray absorption, and Moessbauer spectroscopies as well as high and low temperature magnetometry. The measurements revealed that it is, currently, the material with the highest magnetic moment (6{mu}{sub B}) and Curie temperature (1100 K) in the classes of Heusler compounds as well as half-metallic ferromagnets. The experimental findings are supported by detailed electronic structure calculations.

Subfields: Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/7f6e3f6985e45ccf3e80e0de85a949ec05c06782

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In Atomic and Molecular Physics, and Optics

In Electronic, Optical and Magnetic Materials

In Materials Chemistry

Citations in the corpus

Heusler 4.0: Tunable Materials (2016, background): “is worth noting that the ferromagnetic Heusler compounds Co2MnSi and Co2MnGe with a net magnetic moment of about 5μB display a maximum ρH of 4μΩ (129).”
Half-metallic ferromagnets: From band structure to many-body effects (2007, background): “On the other hand, the highest magnetic moment (6µB) and Curie-temperature (1100K) in the classes of Heusler compounds as well as half-metallic ferromagnets was revealed for Co2FeSi (Wurmehl et al., 2005).”