New Ternary Boride EuRh4B4 Synthesized under High Pressure and Temperature

Abstract:

We report the results of a detailed study of EuRh₄B₄ compound synthesized by an un-common method under high pressure temperature conditions for the first time. Synthesized sample has been initially characterized by X-ray diffraction, macroscopic electrical resistivity and ac-susceptibility methods. The ferromagnetic and superconducting phases were found below 83K and 5.8K respectively. Element-and shell-selective XANES and XMCD techniques have been further applied to check the possible valence transition of Eu ions and their magnetic states. XANES spectra recorded at the Eu L_2,3 absorption edges clearly indicate the presence of either magnetic Eu²⁺ or non-magnetic Eu³⁺ ions in the sample. The XMCD studies have also shown that local magnetic moments of Eu²⁺ ions exist in the superconducting EuRh₄B₄, at least above the transition.

• Periodical: Solid State Phenomena (Volume 190)
• Pages: 421-424
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.190.421
• Online since: June 2012
• Authors: A. Smekhova, L.N. Fomicheva, A.V. Tsvyashchenko, V.A. Sidorov, Andrei Rogalev
• Keywords: Element-Selective Investigations, Magnetic Ions, Superconductivity, XANES, XMCD

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