Negative thermal expansion in the Kondo system CexLa1−xAl2

Lang, M.; Schefzyk, R.; Steglich, F.; Grewe, N.

doi:10.1016/0304-8853(87)90528-2

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Negative thermal expansion in the Kondo system Ce_xLa_1−xAl₂

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Lang, M., Schefzyk, R., Steglich, F., & Grewe, N. (1987). Negative thermal expansion in the Kondo system Ce_xLa_1−xAl₂. Journal of Magnetism and Magnetic Materials, 63-4, 79-81. doi:10.1016/0304-8853(87)90528-2.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0019-CF59-6

Abstract

Measurements of the thermal expansion, α(T), between 0.05 and 370 K are reported for the Kondo system CexLa1−xAl2 with 0.07 ⩽ x ⩽ 1. As the most intriguing result we find for all samples a negative α(T) anomaly at sufficiently low temperatures. Our data suggest this anomaly to be a single-ion property. A natural explanation is furnished by a local Fermi-liquid picture.