Specific heat and electrical resistivity at magnetic fields in antiferromagnetic heavy fermion CeAl2

Abstract

We measured temperature dependence of electrical resistivity and the specific heat as a function of magnetic field up to 8 T in CeAl2. At the metamagnetic transition around 6 T, the coefficient A (ρ ∞ AT2) and Sommerfeld coefficient reduce by 25 %. Such non drastic reduction implies magnetically insensitive phonon could enhance the A and γ in CeAl2 even in low temperature.