Ordering and precipitation effects in the specific heat and magnetization of copper-iron alloys

There is evidence in the specific heat of dilute copper-iron alloys of magnetic interaction phenomena whose behavior varies according to the range of solute concentration. At temperatures well below T_Kondo and at low concentrations two essentially independent contributions to the specific heat are found. One arises from the thermal excitations in the solid solution and the other from those in a rudimentary fine-scale coherent precipitate.The research was supported by the Science Research Council by provision of a Research Studentship, and by the Ministry of Technology, through the National Physical Laboratory, under Contract No. AD 34/8/04/26, by a Research Studentship (D.J.E.) and a Research Grant.