Comparison of Ni-Cu alloy films electrodeposited at low and high pH levels


Alper M., KÖÇKAR H., Safak M., BAYKUL M. C.

JOURNAL OF ALLOYS AND COMPOUNDS, vol.453, pp.15-19, 2008 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 453
  • Publication Date: 2008
  • Doi Number: 10.1016/j.jallcom.2006.11.066
  • Title of Journal : JOURNAL OF ALLOYS AND COMPOUNDS
  • Page Numbers: pp.15-19

Abstract

Ni-Cu alloy films were potentiostatically electrodeposited from the electrolytes with low pH (2.0) and high pH (3.3) levels. The structural analysis of the films was carried out using the X-ray diffraction (XRD) and scanning electron microscopy (SEM) techniques. The XRD data showed that the crystal texture degree was different for the films grown at high pH and low pH. At high pH, the films have a strong (100) texture of the face-centred cubic (fcc) structure, while for the films at low pH the crystal planes are randomly oriented, as in a powder pattern of Cu (or Ni). The SEM studies revealed that the surface morphology of the films strongly depend on the electrolyte pH. Furthermore, the magnetic characteristics studied by a vibrating sample magnetometer (VSM) and magnetotransport properties were observed to be affected by the electrolyte pH. The differences observed in the magnetic and magnetotransport properties were attributed to the structural changes caused by the electrolyte pH. (C) 2006 Elsevier B.V All rights reserved.