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  Avoided ferromagnetic quantum critical point in CeRuPO

Lengyel, E., Macovei, M. E., Jesche, A., Krellner, C., Geibel, C., & Nicklas, M. (2015). Avoided ferromagnetic quantum critical point in CeRuPO. Physical Review B, 91(3): 035130, pp. 1-11. doi:10.1103/PhysRevB.91.035130.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0025-AFD1-D Version Permalink: http://hdl.handle.net/21.11116/0000-0000-F6E5-8
Genre: Journal Article

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Lengyel, E.1, Author              
Macovei, M. E.2, Author              
Jesche, A.3, Author
Krellner, C.1, Author              
Geibel, C.4, Author              
Nicklas, M.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              
5Michael Nicklas, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863472              

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 Abstract: CeRuPO is a rare example of a ferromagnetic (FM) Kondo-lattice system. External pressure suppresses the ordering temperature to zero at about p(c) approximate to 3 GPa. Our ac-susceptibility and electrical-resistivity investigations evidence that the type of magnetic ordering changes from FM to antiferromagnetic (AFM) at about p* approximate to 0.87 GPa. Studies in applied magnetic fields suggest that ferromagnetic and antiferromagnetic correlations compete for the ground state at p > p*, but finally the AFM correlations win. The change in the magnetic ground-state properties is closely related to the pressure evolution of the crystalline-electric-field level scheme and the magnetic Ruderman-Kittel-Kasuya-Yosida exchange interaction. The Neel temperature disappears abruptly in a first-order-like fashion at p(c), hinting at the absence of a quantum critical point. This is consistent with the low-temperature transport properties exhibiting Landau-Fermi-liquid behavior in the whole investigated pressure range up to 7.5 GPa.

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 Dates: 2015-01-26
 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: 91 (3) Sequence Number: 035130 Start / End Page: 1 - 11 Identifier: ISSN: 1098-0121
CoNE: /journals/resource/954925225008