Data for: Free and itinerant electron channels in magnetic NiCu alloys

Published: 15-03-2019| Version 1 | DOI: 10.17632/tvnbpg9hp8.1
GuiDe Tang,
guangheng Wu,
Wei-Hua Qi,
Fengxia Hu,
Li Ma,
Zhuang-Zhi Li


This study explains the electrical-transport and magnetic properties of Ni1-xCux alloys based on a new itinerant electron model for magnetic metals (IEM model) and a Weiss electron pair model (WEP model) [Physics Reports (2018), 758: 1-56]. The concepts of free electron (FE) and itinerant electron (IE) have been used for many years. What is the deference between the roles played by IEs and FEs in a magnetic metal or an alloy? This is very important to understand the valence electron structure. Herein, the valence electrons were classified into FEs, IEs, and local electrons (LEs) in a magnetic metal or an alloy. The FE concentration was estimated using the observed magnetic moments of the NiCu alloys. The temperature dependences of the resistivity of Ni1-xCux alloys with x  0.281 were fitted using an equivalent circuit with two channels. One of the channels corresponded to FEs and the other one to IEs. In addition, the dependence of Curie temperature of the Ni1-xCux alloys on the Cu content was explained using the WEP model.