Skip to Main content Skip to Navigation
Journal articles

Mg substitution in CuCrO2 delafossite compounds

Abstract : A detailed investigation of the series CuCr1−xMgxO2 () has been performed by making high-temperature resistivity and thermopower measurements, and by performing a theoretical analysis of the latter. Microstructure characterization has been carried out as well. Upon Mg2+ for Cr3+ substitution, a concomitant decrease in the electrical resistivity and thermopower values is found, up to , indicating a low solubility limit of Mg in the structure. This result is corroborated by scanning electron microscopy observations, showing the presence of MgCr2O4 spinels as soon as . The thermopower is discussed in the temperature-independent correlation function ratio approximation as based on the Kubo formalism, and the dependence of the effective charge carrier density on the nominal Mg substitution rate is addressed. This leads to a solubility limit of 1.1% Mg in the delafossite, confirmed by energy dispersive X-ray spectroscopy analysis.
Document type :
Journal articles
Complete list of metadatas
Contributor : Elisabeth van T Hof <>
Submitted on : Tuesday, August 6, 2019 - 2:51:51 PM
Last modification on : Friday, January 24, 2020 - 8:10:12 PM

Links full text




Emmanuel Guilmeau, Maria Poienar, Stefan Kremer, Sylvain Marinel, Sylvie Hebert, et al.. Mg substitution in CuCrO2 delafossite compounds. Solid State Communications, Elsevier, 2011, 151 (23), pp.1798-1801. ⟨10.1016/j.ssc.2011.08.023⟩. ⟨hal-02264218⟩



Record views