Suppression of Ferromagnetism in EuxCa1-xB6

V.V. Glushkov; A.V. Kuznetsov; I. Sannikov; A.V. Bogach; S.V. Demishev; V.Y. Ivanov; A.V. Dukhnenko; A.V. Levchenko; N.Y. Shitsevalova; N.E. Sluchanko

doi:10.4028/www.scientific.net/SSP.190.97

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HomeSolid State PhenomenaSolid State Phenomena Vol. 190Suppression of Ferromagnetism in EuxCa1-xB6

Suppression of Ferromagnetism in Eu_xCa_1-xB₆

Abstract:

We report the magnetic properties of Eu_xCa_1-xB₆ single crystals (0.756x1) studied in the wide range of temperatures (1.8-300 K) and magnetic fields (up to 50 kOe). It was found that low field magnetic susceptibility χ (T) follows the Curie-Weiss law χ~(T-Θ_p)^-1at high temperatures for all the concentrations studied. The effective magnetic moment of the Eu²⁺ ion estimated from the data diminishes from the free ion value μ_eff7.93μ_B (μ_B - Bohr magneton) for x=1 to μ_eff7.3μ_B for x=0.756. A universal behavior of magnetic susceptibility χ~(T-Θ)^-α (α=1.5) is detected close to the Curie temperature T_C in the paramagnetic state at both metallic (x>x_C~0.8) and dielectric (xC.

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Solid State Phenomena (Volume 190)

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97-100

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https://doi.org/10.4028/www.scientific.net/SSP.190.97

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June 2012

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V.V. Glushkov, A.V. Kuznetsov, I. Sannikov, A.V. Bogach, S.V. Demishev, V.Y. Ivanov, A.V. Dukhnenko, A.V. Levchenko, N.Y. Shitsevalova, N.E. Sluchanko

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Ferromagnetic Ordering, Metal-Insulator Transition, Phase Separation

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