http://www.cnr.it/ontology/cnr/individuo/prodotto/ID1479

Experimental investigation of the electronic structure of Gd5Ge2Si2 by photoemission and x-ray absorption spectroscopy (Articolo in rivista)

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Label

Experimental investigation of the electronic structure of Gd5Ge2Si2 by photoemission and x-ray absorption spectroscopy (Articolo in rivista) (literal)

Anno

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi

Alternative label

Bondino, F; Brinkman, A; Zangrando, M; Carbone, F; van der Marel, D; Schlagel, DL; Lograsso, TA; Gschneidner, KA; Pecharsky, VK; Parmigiani, F (2007)
Experimental investigation of the electronic structure of Gd5Ge2Si2 by photoemission and x-ray absorption spectroscopy
in Journal of physics. Condensed matter (Print); IOP PUBLISHING LTD, BRISTOL BS1 6BE (Regno Unito)
(literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

Bondino, F; Brinkman, A; Zangrando, M; Carbone, F; van der Marel, D; Schlagel, DL; Lograsso, TA; Gschneidner, KA; Pecharsky, VK; Parmigiani, F (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

Rivista

Note

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Lab Nazl TASC, INFM, CNR, Trieste, Italy; Univ Geneva, Dept Phys Mat Condensee, CH-1211 Geneva, Switzerland; Fac Sci & Technol, Twente, Netherlands; MESA, Twente, Netherlands; Univ Twente, Inst Nanotechnol, Twente, Netherlands; Iowa State Univ, Ames Lab, Mat & Engn Phys Program, Ames, IA 50011 USA; Iowa State Univ, Dept Mat Sci & Engn, Ames, IA 50011 USA; Univ Trieste, Dipartimento Fis, Trieste, Italy; Univ Cattolica Sacro Cuore, Dipartimento Matemat & Fis, Brescia, Italy; Sincrotrone Trieste SCpA, Trieste, Italy (literal)

Titolo

Experimental investigation of the electronic structure of Gd5Ge2Si2 by photoemission and x-ray absorption spectroscopy (literal)

Abstract

The electronic structure of the magnetic refrigerant Gd5Ge2Si2 has been experimentally investigated by photoemission and x-ray absorption spectroscopy. The resonant photoemission and x-ray absorption measurements performed across the Gd N-4,N-5 and Gd M-4,M-5 edges identify the position of Gd 4f multiplet lines, and assess the 4f occupancy (4f(7)) and the character of the states close to the Fermi edge. The presence of Gd 5d states in the valence band suggests that an indirect 5d exchange mechanism underlies the magnetic interactions between Gd 4f moments in Gd5Ge2Si2. From 175 to 300 K the first 4 eV of the valence band and the Gd partial density of states do not display clear variations. A significant change is instead detected in the photoemission spectra at higher binding energy, around 5.5 eV, likely associated to the variation of the bonding and antibonding Ge( Si) s bands across the phase transition. (literal)

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