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  Intermediate valence and Kondo effect in Ce1−xScxAl2

Ruderer, E., Schefzyk, R., Biesenkamp, H., Klämpke, W., Horn, S., & Steglich, F. (1984). Intermediate valence and Kondo effect in Ce1−xScxAl2. Journal of Magnetism and Magnetic Materials, 45(2-3), 219-228. doi:10.1016/0304-8853(84)90010-6.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0019-C2BF-8 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0019-C2C0-2
Genre: Journal Article

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Ruderer, E.1, Author
Schefzyk, R.1, Author
Biesenkamp, H.1, Author
Klämpke, W.1, Author
Horn, S.1, Author
Steglich, F.2, Author              
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1external, ou_persistent22              
2External Organizations, ou_persistent22              

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 Abstract: Results of lattice parameter, thermal expansion, thermopower and magnetic susceptibility measurements are reported for Ce1 − xScxAl2, a system exhibiting a solubility gap over a wide composition range. Two isostructural phases are identified within the gap. For the Sc-rich systems, both phases contain intermediate valent (IV) Ce ions, whereas in the Ce-rich systems (x < 0.5), a low-volume IV phase coexists with a high-volume phase containing Ce3+ ions. The temperature-induced overall valence change of the IV ions amounts to 15–20%. A factor-of-three increase of the spinfluctuation temperature is found upon increasing the Sc concentration from x = 0.5 to 0.95. For the Ce-rich systems, we have discovered a hitherto not known “Kondo anomaly” in the temperature dependence of the thermal expansivity.

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 Dates: 1984-11-02
 Publication Status: Published in print
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Title: Journal of Magnetism and Magnetic Materials
Source Genre: Journal
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Publ. Info: Amsterdam : North-Holland
Pages: - Volume / Issue: 45 (2-3) Sequence Number: - Start / End Page: 219 - 228 Identifier: ISSN: 0304-8853
CoNE: https://pure.mpg.de/cone/journals/resource/954925512464