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Thickness dependence of Structural and Magnetic properties of Ni/Al/Ni films

Author Affiliations

  • 1 Department of Physics, Gulbarga University, Gulbarga 585106, Karnataka, INDIA

Res. J. Physical Sci., Volume 3, Issue (10), Pages 4-8, December,4 (2015)

Abstract

Sandwiched films, Ni(100nm)/Al(t)/Ni(100nm) with t = 60nm, 70nm, 80nm, 90nm and 100nm were deposited at 473K by thermal and electron beam evaporation techniques in high vacuum. Scanning electron microscopy (SEM) and Atomic force microscope (AFM) were employed to study surface structure and grain sizes. Grain sizes are found to be increasing with increasing interfacer layer. Magnetization has been measured in a vibrating sample magnetometer (VSM). Coercive field, saturation magnetization, remanent magnetization were determined. The results revealed the existence of antiferromagnetic (AF) coupling between Ni layers through an interfacer Al layer. The strength of AF coupling was observed to be dependent on Al layer thickness. For the first time that Ni/Al/Ni films of varied Al thickness have been studied for structure and magnetic properties and the data has been thoroughly analyzed.

References

  1. Grünberg P., Some ways to modify the spin-wave mode spectra of magnetic Multilayers, J. Appl. Phys,.57, 3673-3677 (1985)
  2. Grünberg P., Schreiber R., Pang Y., Brodsky M.B. and Sowers H., Layered Magnetic Structures: Evidence for Antiferromagnetic Coupling of Fe Layers across Cr Interlayers, Phys. Rev. Lett.,57, 2442-2445 (1986)
  3. Baibich M.N., Broto J.M., Fert A., F. Nguyen Van Dau, Petroff F., Eitenne P., Creuzet G., Friederich A. and Chazelas J., Giant Magnetoresistance of (001)Fel(001) Cr Magnetic Snperlattices, Phys. Rev. Lett.61, 2472-2475 (1988)
  4. Binasch G., Grünberg P., Saurenbach F. and Zinn W., Enhanced magnetoresistance in layered magnetic structures with antiferromagnetic interlayer exchange, Phys. Rev.,B 39, 4828-4830 (1989)
  5. Parkin S.S.P., More N. and Roche K.P., Oscillations in Exchange Coupling and Magnetoresistance in Metallic Superlattice Structures: Co/Ru, Co/Cr, and Fe/Cr, Phys. Rev. Lett., 64, 2304-2307 (1990)
  6. Niraj Joshi, Debnath A.K., Aswal D.K., Muthe K.P., M. Senthil Kumar, Gupta S.K. and J.V. Yakmi, Morphology and resistivity of Al thin films grown on Si (1 1 1) by molecular beam epitaxy, Vacuum,79, 178-185 (2005)
  7. Kumar Dileep and Gupta Ajay, Effects of Interface Roughness on Interlayer Coupling in Fe/Cr/Fe Structure, Hyperfine Interactions,160, 165-172 (2005)
  8. Kholin DI, Drovosekov AB, Demokritov SO, Rickart M and Kreines NM, Noncollinear Interlayer Exchange in Fe/Cr/Fe Magnetic Structures with Different Interface Roughnesses, Phys Metals Metallography, 101, S67-S69 (2006)
  9. Botana J, Pereiro M, Baldomir D, Kobayashi H and Arias JE, Magnetic and electronic structure of nFe/3Cr/nFe slabs (n = 1 6), Thin Solid Films,516, 5144-5149 (2008)
  10. Aliev FG, Moshchalkov VV and Bruynseraede Y, Anomalous low-temperature resistivity of metallic trilayers: Possible evidence for electron scattering on symmetrical two-level systems, Phys Rev.B, 58,7, 3625-3628 (1998)
  11. Shamsutdinov NR, Bottger AJ and Tichelaar FD, The effect of Cu interlayers on grain size and stress in sputtered Fe–Cu multilayered thin films, Scripta Materialia.54, 1727-1732 (2006)
  12. El Khiraouia S, Sajieddinea M, Hehnb M, Robertb S, Lenobleb O and Bellouardb C, et al. Magnetic studies of Fe/Cu multilayers, Physica B,403, 2509-2514 (2008)
  13. Kumah DP, Cebollada A, Clavero C, Skuza JR, Lukaszew RA and Clarke R, Optimizing the planar structure of (1 1 1) Au/Co/Au trilayers, J Phys D Appl Phys,40, 2699-2704 (2007)
  14. Aswal DK, Muthe KP, Tawde Shilpa, Chodhury Sipra, Bagkar N, Singh Ajay et al. XPS and AFM investigations of annealing induced surface modifications of MgO single crystals, J Crystal Growth,236, 661-666 (2002)
  15. Sasi B and Gopchandran KG, Nanostructured mesoporous nickel oxide thin films Nanotechnology, 18, 115613 (2007)
  16. Sadashivaiah PJ, Sankrappa T and Sujatha T et al, Structural, magnetic and electrical properties of Fe/Cu/Fe films, Vacuum,85, 466-473 (2010)
  17. Ruyi Zhang, Ming Liu, Lu Lu, Shao-Bo Mi and Hong Wang, Strain-tunable magnetic properties of epitaxial lithium ferrite thin film on MgAl substrates, J. Mater. Chem. C,, 5598-5602 (2015)
  18. RS Liu, SC Chang, I Baginskiy, SF Hu and CY Huang, Magnetized cosmological models in bimetric theory of gravitation, Pramana J. Phys., 67(1), 227-237 (2006)
  19. S.S. Malhotra, Y. Liu, J.X. Shen, S.H. Liou and D.J. Sellmyer, Thickness dependence of the magnetic and electrical properties of Fe:SiO nanocomposite films, J. Appl. Phys., 76(10), 6304-6306 (1994)
  20. Anabil Gayen, Barnali Biswas, Akhilesh Kumar Singh, Padmanapan Saravanan and Alagarsamy Perumal, High Temperature Magnetic Properties of Indirect Exchange Spring FePt/M(Cu,C)/Fe Trilayer Thin Films, Hindawi Publishing Corporation Journal of Nanomaterials, Article ID 718365 (2013)
  21. Chiriac H., Grigoras M., Lupu N. and Urse M., The influence of the thickness layers and annealing conditions on the hard magnetic properties of nanocomposite [NdFeBNbCu/FeBSi]xn films, Journal of Optoelectronics and Advanced Materials, 10(12), 3501 - 3504 (2008)