Pressure-tuning of the electronic and magnetic properties of EuPt2Si2

Author(s)

dos Reis, R. D. ; Veiga, L. S., I ; Fabbris, G. ; Garcia, F. ; Haskel, D. ; Gandra, F. C. G. ; Souza-Neto, N. M.

• Document type: Journal article
• Source: Journal of Magnetism and Magnetic Materials; v. 560, p. 6-pg., 2022-07-07.

Abstract

Using the element and orbital selectivity of x-ray absorption spectroscopy at Eu and Pt L-3 edges we investigate the effects of the lattice contraction, induced by temperature and external pressure, on the magnetic and electronic properties of the EuPt2Si2 system. Our findings point to a clear relationship between the volume and the Eu valence in this material. From XANES experiments as a function of pressure we show that the Europium valence tends to stabilize at 3+ for pressures up to 27 GPa. The XMCD results demonstrate that pressure induced valence change of the Europium ion leads to a suppression of the magnetic ordering of the material. Altogether our results provide direct evidence that Eu-4f /5d electronic hybridization effects underlie the mechanism that regulates the valence and magnetic ordering in this material. (AU)

• FAPESP's process: 18/00823-0 - New topological states of matter under extreme conditions
• Grantee: Ricardo Donizeth dos Reis
• Support Opportunities: Research Grants - Young Investigators Grants