Add time:09/24/2019         Source:sciencedirect.com

c-oriented Cu doped ε-Fe2–3N films are fabricated on c-Al2O3 by magnetron sputtering. It is found that the crystal constant c decreases with increasing Cu doping amount, which is due to the smaller radius of Cu atoms. The XPS peaks of Fe 2p and Cu 2p are confirmed with Fe-N and Cu-N binding energy determined. The saturation magnetizations decrease with increasing Cu doping amount, which are attributed to the weakening of Fe-Fe ferromagnetic coupling by Cu doping. Furthermore, the temperature dependences of (RT–R300 K)/R300 K indicate that the resistivity variations with changing temperature are weakened by Cu doping. The manipulable magnetic and transport properties by Cu doping may provide a new method of designing spintronic devices.

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