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  Heavy-fermion characteristics in UCu5Al single crystals

Tran, V. H., Troć, R., Stepień-Damm, J., Komatsubara, T., Steglich, F., Hauser, R., et al. (2002). Heavy-fermion characteristics in UCu5Al single crystals. Physical Review B, 66(5): 054421, pp. 054421-054421. doi:10.1103/PhysRevB.66.054421.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0015-3117-5 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0018-062F-1
Genre: Journal Article

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 Creators:
Tran, V. H.1, Author              
Troć, R., Author
Stepień-Damm, J., Author
Komatsubara, T., Author
Steglich, F.2, Author              
Hauser, R., Author
Bauer, E., Author
Affiliations:
1Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863404              
2Frank Steglich, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863467              

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 Abstract: Electronic properties of the antiferromagnetic Kondo compound UCu5Al have been investigated through magnetic susceptibility, magnetization, specific heat, electrical resistivity, magnetoresistance, and Hall coefficient measurements on single- crystal and polycrystalline samples. UCu5Al orders antiferromagnetically below 16 K and shows a large magnetocrystalline anisotropy. In the paramagnetic state, pronounced incoherent Kondo interactions and crystal field effects are observed. At low temperatures, in spite of the lack of coherence, UCu5Al exhibits some characteristic properties of heavy-fermion systems, namely, an enhanced susceptibility, and enhanced electronic specific heat coefficient, revealing an enhanced effective electron mass. The specific heat and transport properties evidence a competition between the Kondo effect and the Ruderman-Kittel-Kasuya-Yosida interactions. This feature, together with the frustration of the magnetic interactions originating from atomic disorder appear to be important for the development of the heavy-fermion state in UCu5Al.

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Language(s): eng - English
 Dates: 2002-08-01
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Method: Peer
 Identifiers: eDoc: 18536
ISI: 000177873000086
DOI: 10.1103/PhysRevB.66.054421
 Degree: -

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Title: Physical Review B
  Alternative Title : Phys. Rev. B
Source Genre: Journal
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Pages: - Volume / Issue: 66 (5) Sequence Number: 054421 Start / End Page: 054421 - 054421 Identifier: ISSN: 0163-1829