Intermediate valence behavior in CeCo9Si4
- Autor(en)
- M El-Hagary, Herwig Michor, Ernst Bauer, Roland Grössinger, Peter Kerschl, Dieter Eckert, Karl-Hartmut Müller, Peter Franz Rogl, Gerald Giester, Gerfried Hilscher
- Abstrakt
The novel ternary compd. CeCo9Si4 has been studied by means of sp. heat, magnetization, and transport measurements. Single crystal X-ray Rietveld refinements reveal a fully ordered distribution of Ce, Co and Si atoms with the tetragonal space group 14/mcm isostructural with other RCo9Si4. The smaller lattice consts. of CeCo9Si4 in comparison with the trend established by other RCo9Si4 is indicative for intermediate valence of cerium. While RCo9Si4 with R = Pr, ... Tb, and Y show ferromagnetism and LaCo9Si4 is nearly ferromagnetic, CeCo9Si4 remains paramagnetic even in external fields as large as 40 T, though its electronic sp. heat coeff. (g .simeq. 190 mJ/mol K2) is of similar magnitude as that of metamagnetic LaCo9Si4 and weakly ferromagnetic YCo9Si4.
- Organisation(en)
- Institut für Physikalische Chemie, Institut für Mineralogie und Kristallographie
- Externe Organisation(en)
- Technische Universität Wien, Leibniz-Institut für Festkörper- und Werkstoffforschung Dresden
- Journal
- Physica B: Condensed Matter
- Band
- 359-361
- Seiten
- 311-313
- Anzahl der Seiten
- 3
- ISSN
- 0921-4526
- DOI
- https://doi.org/10.1016/j.physb.2005.01.117
- Publikationsdatum
- 2005
- Peer-reviewed
- Ja
- ÖFOS 2012
- 105113 Kristallographie, 1040 Chemie
- Link zum Portal
- https://ucrisportal.univie.ac.at/de/publications/59950e5f-9c54-41e6-a29f-e6fa15dab8b7