Normal state properties of exchange-enhanced paramagnetic compound TiCo

Exchange-enhanced paramagnetic compound TiCo has recently been found to become superconducting at 35 mK. We have measured the electrical resistivity, specific heat, and magnetization in the normal state of a newly prepared polycrystalline TiCo whose superconducting transition temperature is 45 mK in comparison with that whose transition temperature is 35 mK. The electrical resistivity shows a linear relationship with T-2 at low temperatures and a nearly linear relationship with T at high temperatures. Specific heat is interpreted as the sum of the contributions of electron spin fluctuations and lattice vibrations above approximately 2.0 K. The magnetization shows a linear relationship with magnetic field above 1000 Oe, which is in agreement with previous reports. The results agree with the calculations based on the spin fluctuation theory.