A Role of the 3d Electron Subsystem in the Evolution of Band Structure and Magnetic and Optical Properties of ErNi{sub 5 –} {sub x}Co{sub x} Compounds (x = 0–4)

Journal Article · Fri Dec 14 23:00:00 EST 2018 · Physics of the Solid State

DOI:https://doi.org/10.1134/S106378341901013X· OSTI ID:22923155

Lukoyanov, A. V.; Kuz’min, Yu. I.; Kuchin, A. G. ^[1]

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1. Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences (Russian Federation)

The evolution of the electronic structure and optical and magnetic properties of ErNi{sub 5 –} {sub x}Co{sub x} compounds (x = 0–4), occurring upon substitution of nickel by cobalt atoms, has been investigated. Spin-polarization calculations of the band spectrum of these intermetallic compounds have been performed within the local spin density approximation with a correction for strong electron correlations in the 4f shell of a rare-earth ion (method LSDA+U). The values of magnetic moments for erbium, nickel, and cobalt ions (located at different crystallographic sites) are obtained. The exchange-interaction parameters for the 3d sublattice of transition metals are determined. The spectral properties of the compounds have been investigated in the wavelength range of 0.22–15 μm by optical ellipsometry. The experimental frequency dependences of the optical conductivity in the interband absorption region are compared with the corresponding characteristics calculated based on the density of electronic states.

• OSTI ID: 22923155
• Journal Information: Physics of the Solid State, Journal Name: Physics of the Solid State Journal Issue: 12 Vol. 60; ISSN 1063-7834
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
COBALT IONS
CRYSTALLOGRAPHY
D STATES
ELECTRON CORRELATION
ELECTRONIC STRUCTURE
ELECTRONS
ELLIPSOMETRY
ERBIUM IONS
EXCHANGE INTERACTIONS
F STATES
FERROMAGNETISM
INTERMETALLIC COMPOUNDS
MAGNETIC MOMENTS
MAGNETIC PROPERTIES
NICKEL IONS
OPTICAL PROPERTIES
SPECTRA
SPIN ORIENTATION
WAVELENGTHS