Low-temperature specific heats and magnetic properties of Co100-xZrx metallic glasses over a wide concentration range x=10-80

Abstract

Co100-xZrx metallic glasses were fabricated over a composition range x=10-80 by using the ordinary liquid quenching technique in combination with the sputtering technique. A magnetic phase diagram is constructed through measurement of DC and AC magnetisation over the temperature range 4.2-800 K. Based on the magnetic phase diagram, the authors analysed the low-temperature specific heat data in the range 1.5-6 K and successfully singled out the contributions of electronic, lattice and magnetic specific heats. A spectrum of the electron density of states at the Fermi level over a whole Zr concentration range x=10-80 has been deduced.