Optical, magnetic and electronic properties of Ln(2)O(2)Te (Ln = La, Sm and Gd)

Llanos J.; Conejeros, S; Cortés R.; Sánchez V.; Barahona P.; Peña O.

Abstract

The synthesis, the optical and magnetic properties and the electronic structure of the rare-earth oxytellurides of formula Ln2O2Te (Ln = La, Sm and Gd) are reported. The magnetic measurements show that La2O2Te exhibit a diamagnetic behavior. The value of the magnetization M of Gd2TeO2 at our highest available field (50 kOe) is about 5.5μB, well below the expected value for two independent Gd ions (2gJ = 14μB) confirming the antiferromagnetic character of this compound. The magnetic properties of Sm2TeO2 reveal that Sm is in its 3+ oxidation state with a large Van Vleck contribution. The electronic structure calculations, studied by means of a first principles DFT approach, are consistent with the optical measurements and suggest an indirect band gap semiconductor behavior. © 2007 Elsevier Ltd. All rights reserved.

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Título según WOS: Optical, magnetic and electronic properties of Ln(2)O(2)Te (Ln = La, Sm and Gd)
Título según SCOPUS: Optical, magnetic and electronic properties of Ln2O2Te (Ln = La, Sm and Gd)
Título de la Revista: MATERIALS RESEARCH BULLETIN
Volumen: 43
Número: 2
Editorial: PERGAMON-ELSEVIER SCIENCE LTD
Fecha de publicación: 2008
Página de inicio: 312
Página final: 319
Idioma: English
URL: http://linkinghub.elsevier.com/retrieve/pii/S0025540807001146
DOI:

10.1016/j.materresbull.2007.03.008

Notas: ISI, SCOPUS