Pressure–temperature phase diagram of the ferromagnetic Kondo lattice compound CeRuPO

• Published in: Physica. B, Condensed matter Vol. 404; no. 19; pp. 2934 - 2937
• Main Authors: Macovei, M.E., Nicklas, M., Krellner, C., Geibel, C., Steglich, F.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Kidlington Elsevier B.V 15.10.2009; Elsevier
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Electronic conduction in metals and alloys; Electronic transport in condensed matter; Exact sciences and technology; Ferromagnetic materials; Kondo lattice; Magnetic properties and materials; Magnetically ordered materials: other intrinsic properties; Physics; Pressure effect; Scattering mechanisms and kondo effect; Valence fluctuation, kondo lattice, and heavy-fermion phenomena; Ferromagnetic materials; 75.50.Cc; 75.30.Mb; Pressure effect; Kondo lattice; 74.62.Fj; Phase diagrams; Electrical conductivity; Pressure effects; Curie point; Magnetic ordering; Monocrystals; Kondo effect; Ordering
• ISSN: 0921-4526; 1873-2135
• DOI: 10.1016/j.physb.2009.07.037

The new example of a ferromagnetic Kondo lattice, CeRuPO, is a good candidate which offers the opportunity to investigate the physical properties near a ferromagnetic instability. Macroscopic experiments evidenced a Kondo temperature TK=10K and Curie temperature of TC=14K. We have investigated the pressure–temperature phase diagram of CeRuPO by means of electrical resistivity measurements on high quality single crystals in the temperature interval from 1.8 to 300K. The pressure dependence of the ordering temperature follows the anticipated behavior of a Ce-based Kondo lattice system, where pressure is expected to suppress the magnetic order. The critical pressure for the suppression of the transition temperature to zero is estimated to be pc≈3.2GPa.