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Author (up) Hartmann, S.; Deppe, M.; Oeschler, N.; Caroca-Canales, N.; Sereni, J.G.; Geibel, C.
Title Ferromagnetism in CePd1-xRhx single crystals Type Journal Article
Year 2008 Publication Journal of Optoelectronics and Advanced Materials Abbreviated Journal J. Optoelectr. Adv. Mater.
Volume 10 Issue 7 Pages 1607-1611
Keywords Ce compound, ferromagnetism, heavy fermion system
Abstract The orthorhombic CePd1-xRhx alloy exhibits a continuous evolution from a ferromagnetic ground state at x = 0 to

intermediate-valence behavior for x = 1. Here, we report on specific heat CP(T), resistivity ρ(T) and magnetization M(T)

measurements on single crystals in a Rh concentration range 0.2 < x < 0.65 exploring the ferromagnetic side of the

magnetic phase diagram. The transport and thermodynamic properties of the ferromagnetic phase have been investigated

in the temperature range from 300 K down to 0.35 K and analyzed in terms of a gap in the magnon spectrum and an

underlying Kondo contribution. Crystal electric field parameters are deduced from specific heat measurements well above

Tc- The competition between Kondo effect and ferromagnetism has been studied in dependence of the Rh concentration in

the system. Particularly, the enhanced Sommerfeld coefficient γ(x) indicates strong Kondo interactions when the Curie

temperature is reduced.
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Call Number BT @ hernan @ Serial 308
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