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  Entropy Evolution in the Magnetic Phases of Partially Frustrated CePdAl

Lucas, S., Grube, K., Huang, C.-L., Sakai, A., Wunderlich, S., Green, E. L., et al. (2017). Entropy Evolution in the Magnetic Phases of Partially Frustrated CePdAl. Physical Review Letters, 118(10): 107204, pp. 1-5. doi:10.1103/PhysRevLett.118.107204.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002C-DF91-D Version Permalink: http://hdl.handle.net/21.11116/0000-0000-84DF-0
Genre: Journal Article

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 Creators:
Lucas, S.1, Author              
Grube, K.2, Author
Huang, C.-L.3, Author              
Sakai, A.2, Author
Wunderlich, S.4, Author              
Green, E. L.2, Author
Wosnitza, J.2, Author
Fritsch, V.2, Author
Gegenwart, P.2, Author
Stockert, O.3, Author              
Löhneysen, H. v.2, Author
Affiliations:
1Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863462              
2External Organizations, ou_persistent22              
3Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863445              
4Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863404              

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 Abstract: In the heavy-fermion metal CePdAl, long-range antiferromagnetic order coexists with geometric frustration of one-third of the Ce moments. At low temperatures, the Kondo effect tends to screen the frustrated moments. We use magnetic fields B to suppress the Kondo screening and study the magnetic phase diagram and the evolution of the entropy with B employing thermodynamic probes. We estimate the frustration by introducing a definition of the frustration parameter based on the enhanced entropy, a fundamental feature of frustrated systems. In the field range where the Kondo screening is suppressed, the liberated moments tend to maximize the magnetic entropy and strongly enhance the frustration. Based on our experiments, this field range may be a promising candidate to search for a quantum spin liquid.

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Language(s): eng - English
 Dates: 2017-03-172017-03-17
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
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Title: Physical Review Letters
  Abbreviation : Phys. Rev. Lett.
Source Genre: Journal
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Publ. Info: Woodbury, N.Y. : American Physical Society
Pages: - Volume / Issue: 118 (10) Sequence Number: 107204 Start / End Page: 1 - 5 Identifier: ISSN: 0031-9007
CoNE: /journals/resource/954925433406_1