ChemInform Abstract: Low Temperature Specific Heat of CePt2-Derived Compounds.

✍ Scribed by G.-F. VON BLANCKENHAGEN; M. LENKEWITZ; G. R. STEWART

• Publisher: John Wiley and Sons
• Year: 2010
• Weight: 39 KB
• Volume: 29
• Category: Article
• ISSN: 0931-7597
• DOI: 10.1002/chin.199803017

✦ Synopsis

Low Temperature Specific Heat of CePt 2 -Derived Compounds.

-The magnetic to non-magnetic transition of the title compounds is studied by measuring the low temp. specific heat of Ce(Pt 1-x Mx) 2 (I) (M: Ir, Rh; x ≤ 0.5) and of (CexPt 1-x )Pt 2 (II) (x = 0.94 and 0.75) samples. Alloying Ir and Rh on the Pt sites in antiferromagnetic CePt 2 leads to a decrease of T N . For x ¿ 0.25 no magnetic order but an increase of the specific heat (C/T) with decreasing temp. below 10 K and a maximum of the electronic part of the specific heat at T ¿ 10 K, γ HT , depending on x are detected. Mechanisms explaining a concentration-dependent maximum in the value of γ HT are discussed. Ce dilution in (II) also results in an increase of γ HT with decreasing x and a decrease of T N as a function of x. The enhanced γ HT in (II) is attributable to a transfer of degrees of freedom from the magnetic ordering to the screening process.