Abstract
Ce 2 Rh 3 Al 9 has been known as a nonmagnetic heavy-fermion with a temperature dependence of a specific-heat characteristic for the non-Fermi liquids. We present the low-temperature specific heat, AC magnetic susceptibility and electrical resistivity, which display an anomaly at about 20 K. The low-temperature specific-heat data are well described by the S = 1 2 Kondo model. We found also that the low-temperature power-law behavior in the specific-heat and AC susceptibility data can be attributed to the 4f Ce electrons, whereas, the spin fluctuations due to 4d Rh electrons become pronounced at higher temperatures T > 10 K . We also investigated Ce 2 Rh 2 CoAl 9 . The specific heat clearly shows the magnetic ground state of Ce 2 Rh 2 CoAl 9 . The specific heat jump in Δ C at the temperature of magnetic ordering is strongly reduced by Kondo effect. In our linearized muffin-tin orbitals (LMTO) and full potential local orbital (FPLO) calculations both the compounds are nonmagnetic. The stability of an antiferromagnetic ground state in Ce 2 Rh 2 CoAl 9 is discussed in the Kondo-lattice limit within the model proposed by Doradziński and Spałek.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
