Please use this identifier to cite or link to this item: http://hdl.handle.net/10995/102060
Title: Peculiarities of the electronic transport in half-metallic Co-based Heusler alloys
Authors: Marchenkov, V. V.
Perevozchikova, Y. A.
Kourov, N. I.
Irkhin, V. Y.
Eisterer, M.
Gao, T.
Issue Date: 2018
Publisher: Elsevier B.V.
Citation: Peculiarities of the electronic transport in half-metallic Co-based Heusler alloys / V. V. Marchenkov, Y. A. Perevozchikova, N. I. Kourov, et al. — DOI 10.1016/j.jmmm.2017.11.019 // Journal of Magnetism and Magnetic Materials. — 2018. — Vol. 459. — P. 211-214.
Abstract: Electrical, magnetic and galvanomagnetic properties of half-metallic Heusler alloys of Co2YZ (Y = Ti, V, Cr, Mn, Fe, Ni, and Z = Al, Si, Ga, Ge, In, Sn, Sb) were studied in the temperature range 4.2–900 K and in magnetic fields of up to 100 kOe. It was found that varying Y in Co2YZ alloys affects strongly the electric resistivity and its temperature dependence ρ(T), while this effect is not observed upon changing Z. When Y is varied, extrema (maximum or minimum) are observed in ρ(T) near the Curie temperature TC. At T ≤ TC, the ρ(T) behavior can be ascribed to a change in electronic energy spectrum near the Fermi level. The coefficients of normal and anomalous Hall effect were determined. It was shown that the latter coefficient, RS, is related to the residual resistivity ρ0 by a power law RS ∼ ρ0 k/MS with MS the spontaneous magnetization. The exponent k was found to be 1.8 for Co2FeZ alloys, which is typical for asymmetric scattering mechanisms, and 2.9 for Co2YAl alloys, which indicates an additional contribution to the anomalous Hall effect. The temperature dependence of resistivity at low temperatures is analyzed and discussed in the frame of the two-magnon scattering theory. © 2017 Elsevier B.V.
Keywords: HALF METALLIC FERROMAGNETS
HALL EFFECT
HEUSLER ALLOYS
RESISTIVITY
ALUMINUM ALLOYS
BINARY ALLOYS
CARBON DIOXIDE
ELECTRIC CONDUCTIVITY
ELECTRIC CURRENTS
GERMANIUM
HALL EFFECT
MANGANESE
TEMPERATURE DISTRIBUTION
ANOMALOUS HALL EFFECTS
ELECTRONIC ENERGY SPECTRA
GALVANOMAGNETIC PROPERTIES
HALF METALLIC FERROMAGNETS
HEUSLER ALLOYS
SPONTANEOUS MAGNETIZATION
TEMPERATURE DEPENDENCE
TEMPERATURE DEPENDENCE OF RESISTIVITIES
COBALT ALLOYS
URI: http://hdl.handle.net/10995/102060
Access: info:eu-repo/semantics/openAccess
SCOPUS ID: 85034743572
PURE ID: 7143091
a9ddb5f3-0ad2-427f-9df8-3873a3c50986
ISSN: 3048853
DOI: 10.1016/j.jmmm.2017.11.019
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

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