Electronic, phonon and magnon specific heats of FePd alloys - Kuang, J.-p.; Kontani, M.; Matsui, M.; Adachi, K. (Elsevier)
Low temperature specific heat of disordered (fcc and fct) and ordered (CuAu I and Cu"3Au types) FePd alloys has been measured. The coefficients of electronic, phonon and magnon parts were analysed. The density of states attains a maximum, while the Debye temperature and the spin wave stiffness constant show a minimum at the boundary between the fcc and fct phases (33.4% Pd). For the ordered FePd and FePd"3, a lower value of the density of states, and higher values of the Debye temperature and the spin wave stiffness are found. The spin wave stiffness constant for the 32% Pd alloy is also obtained by a thermomagnetic measurement. The ordered FePd gives a value of 93+/-10 meV Å^2, while FePd"3 110+/-10 meV Å^2 at T = 0. Results are discussed from the standpoints of the itinerant electron ferromagnetism.
http://linkinghub.elsevier.com/retrieve/pii/0378-4363(88)90243-4
Keywords: U