English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT

Released

Journal Article

Kondo anomalies of heat conductivity and Lorenz ratio in normal state (La, Ce) Al2

MPS-Authors
There are no MPG-Authors in the publication available
External Resource
No external resources are shared
Fulltext (public)
There are no public fulltexts stored in PuRe
Supplementary Material (public)
There is no public supplementary material available
Citation

Moeser, J. H., & Steglich, F. (1975). Kondo anomalies of heat conductivity and Lorenz ratio in normal state (La, Ce) Al2. Zeitschrift für Physik B, 21(2), 165-170. doi:10.1007/BF01322247.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0019-BF56-9
Abstract
The thermal conductivity of LaAl2 and of two dilute (La, Ce)Al2 alloys was measured in the normal state between 0.4 and 8 K. From the lattice conductivity of LaAl2 a high dislocation densityN d caused by the arc melting process can be inferred. After annealingN d is reduced by an order of magnitude. For the (La, Ce)Al2 samples minima are observed at 5 K in theW e ·T vs.T curves (W e =electronic thermal resistivity). Below 1 K the quantityW e ·T is linear in (— lnT). The electronic Lorenz ratioL e (T)=ρ(T)/W e (T) ·T shows a maximum at 2 K with a value 23% aboveL e (0). It is for the first time that this Kondo anomaly is established in its full temperature dependence.