Weak itinerant ferromagnetism in YCo9Si4

A. Horyn; E. Bauer; G. Hilscher; H. Michor; M. El-Hagary; M. Reissner; P. Mohn; P.Rogl; S. Khmelevskyi; S. Oezcan

arxiv: cond-mat/0406548 · v1 · pith:2TSCXVWNnew · submitted 2004-06-23 · ❄️ cond-mat.str-el

Weak itinerant ferromagnetism in YCo9Si4

H. Michor , M. El-Hagary , S. Oezcan , A. Horyn , E. Bauer , M. Reissner , G. Hilscher , S. Khmelevskyi

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P. Mohn P.Rogl

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classification ❄️ cond-mat.str-el

keywords itinerantferromagnetismweakyco9si4exhibitsmagnetisationmomentordered

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Weak itinerant ferromagnetism in YCo9Si4 below about 25 K is studied by means of magnetisation, specific heat, and resistivity measurements. Single crystal X-ray Rietveld refinements at room temperature reveal a fully ordered distribution of Y, Co and Si atoms within the tetragonal space group I4/mcm isostructural with LaCo9Si4. The latter exhibits itinerant electron metamagnetism with an induced moment of about 1 mu_B/f.u. above 6 T, whereas YCo9Si4 exhibits a spontaneous magnetisation M0~12 Am^2/kg at 2 K which corresponds to an ordered moment of about 1.6 mu_B/f.u. indicating weak itinerant ferromagnetism.

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Weak itinerant ferromagnetism in YCo9Si4

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