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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://elar.urfu.ru/handle/10995/102060 |
Access: | info:eu-repo/semantics/openAccess |
RSCI ID: | 35512971 |
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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