No.5（2002）1.Microstructure and magnetic property of electroless Ni-P alloy film

Kiyoshi ITOH, Feng WANG and Tohru WATANABE

Ni-P alloy films were obtained from Nickel Sulfate baths containing NaH₃PO₂. The crystallographic structure and magnetic properties of electroless Ni-P films werestudied using XRD, TEM and a Vibrating Sample Magnetometer.

The X-ray diffraction patterns of Ni-P electroless films with various P contents gradually changed from sharp peaks to broad peaks with increasing P contents in electroless films.

HRTEM observation revealed that the crystallographic structure of electroless Ni-P film with 25.4at%P content was crystalline and its crystal size was about 2nm. Otherwise, the electroless Ni-P film with 27.1at%P had no crystallization. Films at low P contents had high magnetic force, residual magnetization, and saturated magnetization. In addition, films at high P contents had no magnetic properties.

Keywords
Nickel-Phosphorus, Eectroless Deposition, Amorphous, Microstructure, Magnetism

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