Monolayer magnetism of 3 d transition metals in Ag, Au, Pd, and Pt hosts: Systematics of local moment variation
1991; American Institute of Physics; Volume: 70; Issue: 10 Linguagem: Inglês
10.1063/1.350109
ISSN1520-8850
AutoresMichael E. McHenry, J. M. MacLaren, Dennis P. Clougherty,
Tópico(s)2D Materials and Applications
ResumoElectronic and magnetic properties of T/Aun, T/Agn (T=Cr, Mn, Fe, Co, and Ni), Fe/Pdn and Fe/Ptn multilayers and sandwiches have been computed using the layer Korringa–Kohn–Rostoker (LKKR) band-structure technique. Enhanced (as compared with bulk) 2D T magnetism is observed in all Cr, Mn, and Fe/host configurations, consistent with weak coupling between Cr, Mn, and Fe d bands and those of the noble metal (NM) hosts and consequently d bandwidths which are exceeded by the exchange splitting. Fe and Cr moments vary systematically with the number of mediating Ag or Au planes and the Fermi energy of the system. These systematics are explained by considering the variation of the Fermi energy (EF) with composition as well as constraints of charge neutrality and strong (single-band) ferromagnetism. For Fe in Pt and Pd hosts, d-d hybridization leads to a nearly invariant Fe moment as a function of the number of mediating Pd or Pt planes but with large induced moments on the host.
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