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  Site dependence of the Kondo scale in CePd1-xRhx due to Pd-Rh disorder

Stockert, U., Hartmann, S., Deppe, M., Caroca-Canales, N., Sereni, J. G., Geibel, C., et al. (2015). Site dependence of the Kondo scale in CePd1-xRhx due to Pd-Rh disorder. Physical Review B, 92(5): 054415, pp. 1-7. doi:10.1103/PhysRevB.92.054415.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0028-4E38-F Version Permalink: http://hdl.handle.net/21.11116/0000-0001-17FE-8
Genre: Journal Article

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 Creators:
Stockert, U.1, Author              
Hartmann, S.2, Author              
Deppe, M.2, Author              
Caroca-Canales, N.1, Author              
Sereni, J. G.3, Author
Geibel, C.4, Author              
Steglich, F.5, Author              
Affiliations:
1Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863462              
2Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863404              
3External Organizations, ou_persistent22              
4Christoph Geibel, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863465              
5Frank Steglich, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863467              

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 Abstract: We present measurements of the thermopower S(T) on CePd1-xRhx between 2 K and 300 K. For low Rh content, the system behaves as a ferromagnetic Kondo system with a Curie temperature T-C of about 6 K, a Kondo scale smaller than T-C, and an overall crystal electric field splitting of 210 K. As the Rh content increases T-C is suppressed, while the average Kondo scale gets larger. Simultaneously, the presence of different Ce environments leads to a broad distribution of local Kondo scales ranging from very small values to above 50 K. As a consequence, large thermopower values are observed over an extended temperature range. Close to the critical concentration we find power-law dependencies of S/T vs T down to 2 K. For a Rh content of x = 0.95 we may show explicitly that the thermopower contains contributions from Ce sites with different local energy scales.

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Language(s): eng - English
 Dates: 2015-08-102015-08-30
 Publication Status: Published in print
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Title: Physical Review B
  Abbreviation : Phys. Rev. B
Source Genre: Journal
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Publ. Info: Woodbury, NY : American Physical Society
Pages: - Volume / Issue: 92 (5) Sequence Number: 054415 Start / End Page: 1 - 7 Identifier: ISSN: 1098-0121
CoNE: /journals/resource/954925225008