High-pressure tuning of valence and magnetic interactions in Eu0.5Yb0.5Ga4 | Zendy

G.D. Loula | Zendy; R. D. dos Reis | Zendy; D. Haskel | Zendy; F. García | Zendy; N. M. Souza-Neto | Zendy; F. C. G. Gandra | Zendy

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High-pressure tuning of valence and magnetic interactions in Eu0.5Yb0.5Ga4

Author(s) -

G.D. Loula,

R. D. dos Reis,

D. Haskel,

F. García,

N. M. Souza-Neto,

F. C. G. Gandra

Publication year - 2012

Publication title -

physical review b

Language(s) - English

Resource type - Journals

eISSN - 1538-4489

pISSN - 1098-0121

DOI - 10.1103/physrevb.85.245128

Subject(s) - valence (chemistry) , antiferromagnetism , condensed matter physics , materials science , atomic orbital , ferromagnetism , physics , electron , quantum mechanics

Pressure-induced changes in valence and magnetic ordering are observed in a Eu 0.5Yb 0.5Ga 4 compound by means of element selective x-ray absorption spectroscopy at Eu and Yb L 3 edges. Concomitant Eu and Yb valence transitions towards a 3+ state, together with an antiferromagnetic to ferromagnetic transition, are observed with applied pressures up to 30 GPa. With the support of density functional theory calculations, we argue that hybridization between (Eu/Yb)-5d and Ga orbitals regulates the valence and magnetic exchange interactions in this system. © 2012 American Physical Society

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