Fabrication of Ni/Pd/Ni Multilayer by Pulsed Electrodeposition

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Mechanics, Materials Science & Engineering, May 2017

ISSN 2412-5954

Fabrication of Ni/Pd/Ni Multilayer by Pulsed Electrodeposition 13 T.A. Revathy1, T. Sivaranjani1, K. Dhanapal1, V. Narayanan2, A. Stephen1,a 1

Department of Nuclear Physics, University of Madras, Guindy Campus, Chennai, Tamil Nadu, India

2

Department of Inorganic Chemistry, University of Madras, Guindy Campus, Chennai, Tamil Nadu, India

a

stephen_arum@hotmail.com DOI 10.2412/mmse.99.96.980 provided by Seo4U.link

Keywords: multilayers, anisotropy, pulsed electrodeposition.

ABSTRACT. In the recent years, much interest has been aroused in ultrathin metallic layered magnetic structures. In particular, the sandwich of non-magnetic element between the magnetic elements is a key for the production of structures that exhibits magnetic anisotropy, it shows technologically significant application in perpendicular magnetic and magneto-optic recording. The pulsed electrodeposition method was employed for the deposition of pure nickel, nickel palladium (Ni/Pd) bilayer and nickel palladium nickel (Ni/Pd/Ni) trilayer films. Since pulsed electrodeposition is found to be a powerful tool for producing multilayers and alloys [1]. The X-ray diffraction pattern confirms the formation of fcc structure for both nickel and palladium. The cross sectional view of high resolution scanning electron microscopy shows the layer by layer deposition of nickel and palladium in Ni/Pd and Ni/Pd/Ni films. Vibrating sample magnetometer was employed to study the magnetic behavior of fabricated trilayer.

Introduction. Magnetic nanopattern multilayers establish a new refinement of materials unveiling a wide variety of application such as single electron device, optical media and high-density magnetic memory devices because of its unique property raised due to electron confinement produced in the interfaces of thin layers [2]. Nanopattern multilayered magnetic recording media provide adequate number of advantages than conventional continuous magnetic recording media, including better and higher recording density. Recently research has been made with various forms of magnetic nanopattern structures in order to attain the high recording density and multilayers with large magnetocrystalline anisotropy, high magnetization and chemical stability are found to be more suitable for these recording media [3]. Actually, the magnetic anisotropy of the elements are modified due to the hybridization effects and strain at the interfaces of multilayers comprising of ferromagnetic and non-ferromagnetic elements with periodic repetition[4]. Anisotropy of the film also depends upon the thickness of the layer. The structure, growth condition and layer composition profiles the magnetic property. Fabrication of layer by layer assembly of ferromagnetic nickel and nonferromagnetic palladium multilayers are done by several technique such as sputtering, evaporation, chemical vapor deposition, other vacuum deposition processes and electrodeposition. Among them Pulsed electrodeposition (PED) is the less expensive and simple method for depositing the films since PED has three parameter which can control the nature of the deposit like smoothness, film formation, crystallinity, etc., In this work, our aim has been to fabricate Ni, deposit pure nickel, nickel palladium (Ni/Pd) bilayer and nickel palladium nickel (Ni/Pd/Ni) trilayer so as to study the behaviour of nickel and palladium when they are in layered nature and reported the investigation of structural, morphological and magnetic properties of layered films. Experiment

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-NC-ND license http://creativecommons.org/licenses/by-nc-nd/4.0/

MMSE Journal. Open Access www.mmse.xyz

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