Neutron Diffraction Study of CrGe

Kolenda, M.; Leciejewlcz, J.; Szytuza, A.

doi:10.1002/pssb.2220570245

Cited by 10 publications

(2 citation statements)

References 6 publications

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“…Optimizing the internal positional parameters of Cr and Ge yielded x Cr = y Cr = z Cr = 0.1351 and x Ge = y Ge = z Ge = 0.8452 for the nonmagnetic LSDA case. x Ge agrees perfectly with the value 0.847 deduced from neutron-scattering data, while x Cr is slightly smaller than the reported experimental value x Cr = 0.143 [28]. Switching to GGA or to magnetic order before optimization leads to a change of less than 0.002 in the internal atomic position parameters.…”

Section: Fermi-surface Calculationssupporting

confidence: 82%

“…However, below 100 K, instead of increasing further, the magnetic susceptibility χ (T ) forms a broad maximum at about 60 K and merges below 20 K in a temperature-independent strongly enhanced Pauli susceptibility [27]. Accordingly, neutron-diffraction experiments showed no magnetic order down to 4.2 K [28]. Some susceptibility experiments indicated a small ordered magnetic moment in CrGe, but this was shown to arise from Cr 11 Ge 19 impurities [29].…”

Section: Introductionmentioning

confidence: 97%

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Electronic band structure and proximity to magnetic ordering in the chiral cubic compound CrGe

et al. 2019

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CrGe belongs to the family of cubic B20 intermetallics. From experimental investigations by susceptibility and de Haas-van Alphen (dHvA) measurements and from calculations of its electronic band structure by densityfunctional theory (DFT), CrGe is found to form a metallic paramagnetic ground state. Combining dHvA and DFT data, a detailed picture of the Fermi surface of CrGe is provided. The proximity to a magnetic longrange ordering in CrGe is suggested from a prominent thermal magnetic susceptibility. The possibility to induce magnetic long-range order in CrGe is discussed based on calculated properties for CrGe substituting Ge by As or Sn, and from a comparison with MnGe and the alloy series Cr 1−x Mn x Ge. Owing to the noncentrosymmetric and nonsymmorphic crystal structure of CrGe, in absence of broken time reversal symmetry, its band structure is marked by forced nodal lines at the Fermi edge. Moreover, this material hosts degenerate unconventional electronic quasiparticles. In particular, CrGe exhibits a sixfold degeneracy of fermions crossing within about 5 meV of the Fermi energy at the R point of the Brillouin zone.

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Section: Fermi-surface Calculationssupporting

confidence: 82%

Section: Introductionmentioning

confidence: 97%

Electronic band structure and proximity to magnetic ordering in the chiral cubic compound CrGe

et al. 2019

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Cr-Ge (Chromium-Germanium)

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Cr-Cs – Cu-Zr

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Compton profile study of V3Ge and Cr3Ge

et al. 2008

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In this paper the results of a Compton profile study of two polycrystalline A15 compounds, namely, V3Ge and Cr3Ge, have been reported. The measurements have been performed using 59.54 keV γ-rays from an 241 Am source. The theoretical Compton profiles have been computed for both the compounds using ab-initio linear combination of atomic orbitals (LCAO) method employing CRYSTAL98. For both the A15 compounds, the isotropic experimental profiles are found to be in good overall agreement with the calculations. The comparison points out residual differences in V3Ge whereas for Cr3Ge the differences are within experimental error. The behaviour of valence electrons in the two iso-structural compounds has been examined on the scale of Fermi momentum. The valence electron distribution seems to be dominated by the metallic constituents rather than Ge and two compounds show covalent nature of bonding which is larger in V3Ge compared to Cr3Ge.

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Neutron Diffraction Study of CrGe

Cited by 10 publications

References 6 publications

Electronic band structure and proximity to magnetic ordering in the chiral cubic compound CrGe

Electronic band structure and proximity to magnetic ordering in the chiral cubic compound CrGe

Cr-Ge (Chromium-Germanium)

Compton profile study of V3Ge and Cr3Ge

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