Abstract
The galvanomagnetic and magnetic properties of EuB6 single crystal have been measured over wide temperature (1.8–300 K) and magnetic-field (up to 70 kOe) ranges, and the parameters of charge carriers and the characteristics of the magnetic subsystem are estimated in the paramagnetic and ferromagnetic (T < T C ≈ 13.9 K) phases of this compound with strong electron correlations. In the temperature range T < T* ≈ 80 K, a magnetoresistance hysteresis Δρ(H)/ρ(0) is detected; it reaches a maximum amplitude of about 5% at T ≈ 12 K. The anomalies of charge transport observed in the temperature range T C < T < T* are shown to be related to the magnetic scattering of charge carriers (m eff = (15–30)m 0, where m 0 is the free-electron mass) that results from a short-range magnetic order appearing upon the formation of ferromagnetic nanoregions (ferrons).
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Original Russian Text © V.V. Glushkov, A.V. Bogach, K.V. Gon’kov, S.V. Demishev, V.Yu. Ivanov, A.V. Kuznetsov, N.A. Samarin, N.Yu. Shitsevalova, K. Flachbart, N.E. Sluchanko, 2007, published in Zhurnal Éksperimental’noĭ i Teoreticheskoĭ Fiziki, 2007, Vol. 132, No. 1, pp. 150–153.
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Glushkov, V.V., Bogach, A.V., Gon’kov, K.V. et al. Magnetic and transport properties of colossal magnetoresistance compound EuB6 . J. Exp. Theor. Phys. 105, 132–134 (2007). https://doi.org/10.1134/S1063776107070278
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DOI: https://doi.org/10.1134/S1063776107070278