Magnetic Entropy of Ferro- and Antiferromagnetic Ce(Fe_<1-x>Co_x)_2

概要

論文の詳細を見る
Specific heat and high field magnetization were measured for Ce(Fe_<1-x>Co_x)_2, which shows a double magnetic transition in the concentration range of 0.04<x<0.3. The compounds with 0≤x≤0.3 show a specific heat anomaly due to the ferromagnetic to paramagnetic transition at T_c. Magnetic entropy of CeFe_2 was evaluated as 2.5 J/K mol, which is much lower than that expected from a localized moment model. Besides anomaly at T_c, another specific heat anomaly due to the antiferromagnetic (AF) to ferromagnetic (F) transition was observed for x=0.1 and 0.2. It is shown that the entropy change associated with the AF-F transition is mainly described by a difference in the electronic specific heat between the F and AF states. The AF-F transition of Ce(Fe_<1-x>Co_x)_2 is discussed from the thermodynamical point of view.
社団法人日本物理学会の論文
1993-04-15