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Carriers mediated magnetic and impedance spectroscopic analysis of sol–gel synthesized Zn0.95−x Mn x Fe0.05O (0 ≤ x ≤ 0.05) DMSs

  • Review Paper: Sol-gel and hybrid materials for dielectric, electronic, magnetic and ferroelectric applications
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Abstract

Zn0.95−x Mn x Fe0.05O (0 ≤ x ≤ 0.05) dilute magnetic semiconductors were prepared using sol–gel auto-combustion method for potential spintronic applications. Effect of Mn + Fe doping on dielectric and magnetic behavior of ZnO-based dilute magnetic semiconductors has been probed systematically. Investigation of crystal structure reveals that co-doping of Mn and Fe into the host ZnO does not transform its wurtzite-type hexagonal lattice. This efficient substitution of the dopants at the host site resulted in a gradual decrease in the lattice parameters attributed to the local coordination. Well-dispersed nanometer-sized grains have been revealed by images obtained using a field emission scanning electron microscope. Energy-dispersive X-ray analysis confirms the exact nominal composition of the stoichiometric elements present in the samples. Dielectric measurements performed using an impedance analyzer in a frequency range of 20 Hz to 20 MHz follow Koop’s theory and Maxwell–Wagner two-layered model. Nyquist plot (Cole–Cole) shows that the data points are laying on single semicircle, which shows the dominant behavior of the grain boundary’s effect. Magnetic characteristics explored by a vibrating sample magnetometer revealed that with increased Mn doping, enhanced values of both saturation magnetization and coercivity were obtained.

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Acknowledgments

Authors are thankful to Higher Education Commission of Pakistan (HEC) for financially supporting this work through research project number NRPU-2471.

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Authors and Affiliations

  1. Centre of Excellence in Solid State Physics, University of the Punjab, Quaid-e-Azam Campus, Lahore, 54590, Pakistan

    M. Sajid Shafiq, Muhammad Furqan, Shahid Atiq, Saira Riaz & Shahzad Naseem

  2. Department of Physics, School of Science and Engineering (SSE), Lahore University of Management Sciences (LUMS), Lahore, 54792, Pakistan

    Murtaza Saleem

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  1. M. Sajid Shafiq
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  2. Muhammad Furqan
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  3. Shahid Atiq
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  4. Murtaza Saleem
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Correspondence to Shahid Atiq.

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Shafiq, M.S., Furqan, M., Atiq, S. et al. Carriers mediated magnetic and impedance spectroscopic analysis of sol–gel synthesized Zn0.95−x Mn x Fe0.05O (0 ≤ x ≤ 0.05) DMSs. J Sol-Gel Sci Technol 79, 535–542 (2016). https://doi.org/10.1007/s10971-016-4079-z

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  • DOI: https://doi.org/10.1007/s10971-016-4079-z

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