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Magnetic and electronic properties of the antiferromagnetic YbFe4Al8 compound |
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| Authors: | T Toliński B Andrzejewski G Che?kowska J Fr?ckowiak |
| Institution: | a Institute of Molecular Physics, Polish Academy of Sciences, Smoluchowskiego 17, 60-179 Poznan, Poland b Institute of Physics, Silesian University, Uniwersytecka 4, 40-007 Katowice, Poland c Institute of Materials Science, Silesian University, 40-007 Katowice, Bankowa 12, Poland |
| Abstract: | The magnetic, electrical and electronic properties of the tetragonal ternary YbFe4Al8 compound have been investigated. This compound was supposed to be an antiferromagnetic superconductor due to the negative magnetization signal appearing at a low field of the field cooling mode, however, based on the measurements of the temperature dependence of magnetization and resistivity we do not confirm the presence of superconductivity in this material and we ascribe the negative magnetization to the complicated non-collinear magnetic structure. A switch to the antiferromagnetic order at about 150 K has been visible both on the M(T) and ρ(T) curves. The valence state of the Yb ions has been studied by X-ray photoemission spectroscopy. The valence band spectrum at the Fermi level exhibits the domination of the hybridized Yb(4f) and Fe(3d) states. |
| Keywords: | A Intermetallic compounds C Photoelectron spectroscopy D Magnetic properties |
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