【摘要】 PdAu₂₅Fe₂₁和PdAu₂₄Fe₂₁Al₄合金（以下简称PdAuFe,PdAuFeAl）分别在临界温度500℃和550℃产生无序—有序转变。有序相是典型的Cu₃Au型结构。有序化时合金由铁磁体转变为反铁磁体,电导率和磁化率大大减小,热电势改变符号。研究结果表明,合金反常的电磁特性起因于原子的有序排列和d带电子能态的变化。更多还原

【Abstract】 There is a disorder-order transition in the PdAu25Fe21 and PdAu24 Fe21Al4 alloys at critical temperatures of 500℃ and 550℃ respectively, The ordered phase is a superstructure of Cu3Au type. The disorder-order transition of the alloys brings about a physical change from the ferromagnetic state to antiferromagnetic state, considerable decrease in susceptibility and conductivity, and a change in the sign of thermo-electromo-tive force. The experimental results show that the anomalous behaviors of the alloys result from the atomic ordering and the change of d-band states.更多还原