Journalartikel

Jahr der Veröffentlichung: 2004

Seiten: 179-205

Zeitschrift: Progress in Solid State Chemistry

Bandnummer: 32

Heftnummer: 3-4

ISSN: 0079-6786

DOI Link: https://doi.org/10.1016/j.progsolidstchem.2005.05.002

Verlag: Elsevier

Abstract: 
The magnetoresistance (MR) effect of the low temperature phase of silver selenide (alpha-Ag2+delta Se) is studied with both bulk and thin film samples within a wide range of composition, i.e. metal content. Homogeneous bulk silver selenide shows the ordinary magnetoresistance (OMR) effect, which can be explained by the two-band model of a classical semiconductor. Heterogeneous silver selenide forms a semi-conductor/metal dispersion which shows completely different MR effects, depending on the microstructure of the samples. XRD and TEM studies of thin film samples prove the two-phase character of the silver-rich material, and also offer new insights into the microstructure of the low temperature phase of silver selenide: Two selenide phases appear and form a "nano-parquet" of two coexisting selenide phases with both coherent twin boundaries and incoherent large angle grain boundaries. This microstructure is discussed as the possible reason for the observed MR effects.

Harvard-Zitierstil: Janek, J., Mogwitz, B., Beck, G., Kreutzbruck, M., Kienle, L. and Korte, C. (2004) The magnetoresistance of metal-rich Ag2+xSe - A prototype nanoscale metal/semiconductor dispersion?, Progress in Solid State Chemistry, 32(3-4), pp. 179-205. https://doi.org/10.1016/j.progsolidstchem.2005.05.002

APA-Zitierstil: Janek, J., Mogwitz, B., Beck, G., Kreutzbruck, M., Kienle, L., & Korte, C. (2004). The magnetoresistance of metal-rich Ag2+xSe - A prototype nanoscale metal/semiconductor dispersion?. Progress in Solid State Chemistry. 32(3-4), 179-205. https://doi.org/10.1016/j.progsolidstchem.2005.05.002