Weak itinerant ferromagnetism in YCo9Si4
H. Michor, M. El-Hagary, S. Oezcan, A. Horyn, E. Bauer, M. Reissner,, G. Hilscher, S. Khmelevskyi, P. Mohn, P.Rogl
TL;DR
This study investigates weak itinerant ferromagnetism in YCo9Si4 below 25 K using magnetization, heat capacity, and resistivity measurements, revealing spontaneous magnetization and ordered moments consistent with itinerant ferromagnetic behavior.
Contribution
The paper provides the first detailed characterization of weak itinerant ferromagnetism in YCo9Si4, including structural analysis and magnetic properties.
Findings
YCo9Si4 exhibits spontaneous magnetization below 25 K.
The ordered magnetic moment is approximately 1.6 μ_B per formula unit.
YCo9Si4's magnetic behavior is consistent with weak itinerant ferromagnetism.
Abstract
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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