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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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Lengyel, E.1, Autor           
Macovei, M. E.1, Autor           
Jesche, A.2, Autor
Krellner, C.2, Autor           
Geibel, C.3, Autor           
Nicklas, M.4, Autor           
Affiliations:
1Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863404              
2External Organizations, ou_persistent22              
3Christoph Geibel, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863465              
4Michael Nicklas, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863472              

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 Zusammenfassung: 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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 Datum: 2015-01-26
 Publikationsstatus: Erschienen
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 Ort, Verlag, Ausgabe: -
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 Art der Begutachtung: -
 Identifikatoren: ISI: 000348475700004
DOI: 10.1103/PhysRevB.91.035130
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Titel: Physical Review B
  Kurztitel : Phys. Rev. B
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: Woodbury, NY : American Physical Society
Seiten: - Band / Heft: 91 (3) Artikelnummer: 035130 Start- / Endseite: 1 - 11 Identifikator: ISSN: 1098-0121
CoNE: https://pure.mpg.de/cone/journals/resource/954925225008