Preparation, magnetic and optical properties of layered oxychalcogenides SmCuOCh (Ch = S or Se)

Journal Article · Thu Jul 13 04:00:00 EDT 2006 · Materials Research Bulletin

DOI:https://doi.org/10.1016/j.materresbull.2006.01.012· OSTI ID:20895236

Llanos, Jaime ^[1]; Cortes, Rodrigo ^[1]; Guizouarn, T ^[2]; Pena, Octavio ^[2]

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1. Departamento de Quimica, Universidad Catolica del Norte, Avda. Angamos 0610, Casilla 1280, Antofagasta (Chile)
2. Laboratoire de Chimie du Solide et Inorganique Moleculaire, UMR 6511-CNRS, Universite de Rennes 1-Institut de Chimie de Rennes, 35042 Rennes Cedex (France)

This paper reports on the synthesis and the electrical, magnetic and optical properties of SmCuOS and SmCuOSe. The magnetic properties reveal that Sm is in its 3+ oxidation state ({mu} {sup theo} = g{radical}J(J + 1) = 0.85 {mu}{sub B}; g = 2/7) with a large Van Vleck contribution, and exclude the possibility of a divalent oxidation state for samarium (Sm{sup 2+}; {sup 7}F{sub 0} state, g = J = 0, {mu} {sub eff} = 0). Optical properties were studied by means of diffuse reflectance and photoluminescence spectra in the UV-vis range. The electrical measurements show that the two samarium copper oxychalcogenides, SmCuOSe and SmCuOS are semiconductors with optical band gap (E {sub g}) values of 2.60 and 2.90 eV, respectively.

• OSTI ID: 20895236
• Journal Information: Materials Research Bulletin, Journal Name: Materials Research Bulletin Journal Issue: 7 Vol. 41; ISSN MRBUAC; ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CHEMICAL PREPARATION
COPPER
ELECTRICAL PROPERTIES
EV RANGE 01-10
MAGNETIC PROPERTIES
OPTICAL PROPERTIES
PHOTOLUMINESCENCE
SAMARIUM
SAMARIUM IONS
SEMICONDUCTOR MATERIALS