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Characterization of electrodeposited nanocrystalline Ni-Mn thin films for MEMS applications

M. RAJESWARI1,* , S. GANESAN1, T. M. SELVAKUMARI2, R. KANNAN3

Affiliation

  1. Department of Physics, Government College of Technology, Coimbatore-641013, Tamilnadu, India
  2. Department of Physics, Angel College of Engineering, Tripur-641665, Tamilnadu, India
  3. Department of Physics, KSR College of Engineering, Tiruchengode-637215, Tamil Nadu, India

Abstract

Nanocrystalline (crystallite size 18.319 nm to 22.512 nm) Ni-Mn alloy coatings were produced from chloride – citrate bath at different temperature on copper substrate. The effects of temperature on the structure, surface morphology, elemental composition, magnetic properties and mechanical properties of electrodeposited Ni-Mn thin films were studied. The structural and surface properties of Ni-Mn thin films were studied by using X-ray Diffractometer (XRD) and Scanning Electron Microscopy (SEM). Elemental compositions of the films were measured by means of Energy Dispersive X-ray Spectroscopy (EDAX). Magnetic properties of the thin films were studied with the aid of Vibrating Sample Magnetometer (VSM). The deposited Ni-Mn films were found to be crystalline in nature due to the increment of temperature. The deposits of Ni-Mn thin films were found to be shiny, smooth and good adherence to the substrate. The deposits were found to have face centered cubic (FCC) structure. Due to the increment of grain size, coercivity of the films were found to increase..

Keywords

Ni-Mn, Thin films, Electrodepsition, Magnetic properties.

Submitted at: June 6, 2013
Accepted at: May 15, 2014

Citation

M. RAJESWARI, S. GANESAN, T. M. SELVAKUMARI, R. KANNAN, Characterization of electrodeposited nanocrystalline Ni-Mn thin films for MEMS applications, Journal of Optoelectronics and Advanced Materials Vol. 16, Iss. 5-6, pp. 640-644 (2014)