Electronic structure and weak itinerant magnetism in metallic Y2Ni7

Singh, David J.

doi:10.1103/PhysRevB.92.174403

Title: Electronic structure and weak itinerant magnetism in metallic $Y_{2} {Ni}_{7}$

Journal Article · Tue Nov 03 00:00:00 EST 2015 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PhysRevB.92.174403· OSTI ID:1239755

Singh, David J. ^[1]

Univ. of Missouri, Columbia, MO (United States)

We describe a density functional study of the electronic structure and magnetism of Y₂Ni₇. The results show itinerant magnetism very similar to that in the weak itinerant ferromagnet Ni₃Al. The electropositive Y atoms in Y₂Ni₇ donate charge to the Ni host mostly in the form of s electrons. The non-spin-polarized state shows a high density of states at the Fermi level, N (E_F), due to flat bands. This leads to a ferromagnetic instability. However, there are also several much more dispersive bands crossing E(F), which should promote the conductivity. Spin fluctuation effects appear to be comparable to or weaker than Ni₃Al, based on comparison with experimental data. Y₂Ni₇ provides a uniaxial analog to cubic Ni₃Al, for studying weak itinerant ferromagnetism, suggesting detailed measurements of its low temperature physical properties and spin fluctuations, as well as experiments under pressure.

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1239755

Alternate ID(s):: OSTI ID: 1225120

Journal Information:: Physical Review. B, Condensed Matter and Materials Physics, Vol. 92, Issue 17; ISSN 1098-0121

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 9 works

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Relation between the weak itinerant magnetism in $A_2$Ni$_7$ compounds ($A$ = Y, La) and their stacked crystal structures Crivello, Jean-Claude; Paul-Boncour, Valérie arXiv https://doi.org/10.48550/arxiv.1903.11423	text	January 2019

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Title: Electronic structure and weak itinerant magnetism in metallic $Y_{2} {Ni}_{7}$