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Cited by 956

The DOI matches its Crossref record; 18 of the 18 references it cites were found in a registry or an index.

Formation and coupling of magnetic moments in Heusler alloys

Kübler, J., William, A. R., Sommers, C. B.·1983·Physical Review B
DOI 10.1103/physrevb.28.1745
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Abstract

The microscopic mechanisms responsible for both the formation and coupling of magnetic moments in Heusler alloys (${X}_{2}\mathrm{Mn}Y$) are identified. We find that the $X$ atoms (e.g., Cu, Pd) serve primarily to determine the lattice constant, while the $Y$ atoms (e.g., Al, In, Sb) mediate the interaction between the $\mathrm{Mn}d$ states. There is no significant direct interaction between the Mn atoms, but the occupied $d$ states of Mn are delocalized by their strong interaction with the $X$-atom $d$ states. The localized character of the magnetization results from the exclusion of minority-spin (defined locally) electrons from the $\mathrm{Mn}3d$ shell. The coupling between the localized magnetic Mn moments can be described with the Heisenberg Hamiltonian and the sign of the exchange constants results from a competition between the intra-atomic magnetic energy and interatomic $Y$-atom mediated covalent interactions between the the $\mathrm{Mn}d$ states. These effects compete because the covalent mechanism is possible only for antiferromagnetic alignments, but necessarily reduces the magnitude of the local moments. The sensitive dependence of magnetic order on the occupation of the mediating $p\ensuremath{-}d$ hybrid states accounts well for experiments by Webster in which this occupation is varied by alloying. Our analysis is based on self-consistent, spin-polarized energy-band calculations for ${\mathrm{Co}}_{2}$MnAl, ${\mathrm{Co}}_{2}$MnSn, ${\mathrm{Ni}}_{2}$MnSn, ${\mathrm{Cu}}_{2}$MnAl, ${\mathrm{Cu}}_{2}$MnSn, ${\mathrm{Pd}}_{2}$MnIn, ${\mathrm{Pd}}_{2}$MnSn, and ${\mathrm{Pd}}_{2}$MnSb, for both ferromagnetic and antiferromagnetic spin alignments.

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Metadata

Authors
Kübler, J., William, A. R., & Sommers, C. B.
Venue
Physical Review B
Publisher
American Physical Society (APS)
Published
1983-08-15
Volume
28
Issue
4
Pages
1745-1755
ISSN
0163-1829 (ISSN-L)
DOI
10.1103/physrevb.28.1745
OpenAlex
W2011034835
Cited by
956
References
18
FWCI
5.44
Type
journal article
Language
en
Open access
closed

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