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Title: Magnetization enhancement due to incorporation of non-magnetic nitrogen content in (Co{sub 84}Zr{sub 16})N{sub x} nano-composite films

We report the magnetic, electronic, and structural properties of nano-composite (Co{sub 84}Zr{sub 16})N{sub x} or CZN films prepared by reactive co-sputter deposition method. As-deposited CZN films have shown enhancement in magnetization (M{sub s}) with incorporation of nitrogen content, which is related to the evolution of nano-composite phase. X-ray diffraction study has confirmed poly-crystalline growth of CZN films with fcc(331) and fcc(422) phases. High-resolution transmission electron microscope study reveals that CZN films are composed of ordered and crystalline ferromagnetic Co nano-clusters, which are embedded in the nano-composite matrix. Photoemission measurements show the change in the intensity near the Fermi level most likely due to defects and shift in the core-levels binding energy with nitrogen concentration. Raman spectroscopy data show an increase in the intensity of the Raman lines with nitrogen concentration upto 20%. However, the intensity is significantly lower for 30% sample. This indicates that less nitrogen or defect states are being substituted into the lattice above 20% and is consistent with the observed magnetic behavior. Our studies indicate that defects induced due to the incorporation of non-magnetic nitrogen content play a key role to enhance the magnetization.
Authors:
;  [1] ;  [2] ; ; ;  [3]
  1. CSIR-Central Electronics Engineering Research Institute, Pilani, Rajasthan 333031 (India)
  2. (India)
  3. Novel Materials and Interface Physics Laboratory, Department of Physics, Indian Institute of Technology Delhi, Hauz Khas, New Delhi-110016 (India)
Publication Date:
OSTI Identifier:
22492416
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Advances; Journal Volume: 6; Journal Issue: 1; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; BINDING ENERGY; CONCENTRATION RATIO; CRYSTAL GROWTH; DEPOSITION; FCC LATTICES; FERMI LEVEL; FILMS; MAGNETIZATION; MATRIX MATERIALS; NANOCOMPOSITES; PHOTOEMISSION; RAMAN SPECTROSCOPY; RESOLUTION; SPUTTERING; TRANSMISSION ELECTRON MICROSCOPY; X-RAY DIFFRACTION