Avoided ferromagnetic quantum critical point: Antiferromagnetic ground state in substituted CeFePO

Autor: Jesche, Anton, Balle, Tanita, Kliemt, Kristin, Geibel, Christoph, Brando, Manuel, Krellner, Cornelius
Rok vydání: 2016
Předmět:
Zdroj: Phys. Status Solidi B 254, 1600169 (2017)
Druh dokumentu: Working Paper
DOI: 10.1002/pssb.201600169
Popis: We have investigated single crystals of two substitution series Ce(Ru$_{1-x}$Fe$_{x}$)PO and CeFe(As$_{1-y}$P$_{y}$)O in the vicinity to the quantum critical material CeFePO by means of magnetic-susceptibility and specific-heat measurements. We observe an antiferromagnetic ground state in the vicinity of the quantum critical point, with pronounced metamagnetic transitions for $H\parallel c$, which is the magnetically hard direction. Our results verify that a ferromagnetic quantum critical point is avoided in substituted CeFePO, because we clearly demonstrate that the ferromagnetic ground state changes into an antiferromagnetic one, when approaching the quantum critical point.
Databáze: arXiv