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Significantly improved magnetic parameters of Co–La co-doped strontium hexagonal ferrites for recording applications: structural, hysteresis, and mössbauer performance metrics

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Abstract

M-type hexaferrite substituted with cobalt and lanthanum [\({\text{SrCo}}_{1.5z} {\text{La}}_{0.5z} {\text{Fe}}_{12 - 2z} {\text{O}}_{19}\) (SCLF; 0.0 \(\le z \le 0.5)\)] was synthesized by auto-combustion Sol–gel methodology. XRD study indicated that prepared specimens exhibit a hexagonal magnetoplumbite phase without any secondary peak. The crystallite size decreases from 48.94 to 28.82 nm as the level of substitution increases in SrM hexaferrite. The micrographs showed an enhancement in the inter-grain connectivity of grains with substitution. Mössbauer spectra revealed the variation observed in hyperfine interactions, isomer shift, quadrupole splitting, and relative area of five sextets of Fe3+ ions. Analysis of Mössbauer depicted that the substituents tend to occupy spin-up 12k-2a sites of crystal lattice from z = 0.0 to z = 0.3, which elucidated the diminution observed in magnetization. The coercivity gradually decreased from z = 0.0 (5026.54 Oe) to z = 0.5 (862.47 Oe). The saturation magnetization initially decreased with substitution from z = 0.0 to 0.3 and then increased for z = 0.4 and 0.5 samples. The magnetic susceptibility (dM/dH) of samples derived from magnetic parameters is high for z = 0.0, 0.2, 0.3, and 0.4. Both Ms with tunable Hc and magnetic susceptibility results make them considerable materials for recording applications.

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The datasets generated during and/or analyzed during the current study are available from the corresponding author on reasonable request.

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There are not any financial and personal relationships with other people or organisations that could be viewed as inappropriately influencing (bias) their work. Funding source(s) had no such involvement in the collection, analysis and interpretation of data; in the writing of the report.

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Authors and Affiliations

  1. Department of Physics, School of Chemical Engineering and Physical Sciences, Lovely Professional University, Phagwara, Punjab, 144411, India

    Manisha Thakur & A. K. Srivastava

  2. School of Electronics and Electrical Engineering, Lovely Professional University, Phagwara, Punjab, 144411, India

    Charanjeet Singh

  3. Ioffe Institute, Saint Petersburg, Russia, 194021

    Kirill D. Martinson & Vadim I. Popkov

  4. RITVERC JSC, Saint Petersburg, Russia, 194223

    Ivan V. Buryanenko

  5. Institute of Chemistry, Saint Petersburg State University, Saint Petersburg, Russia, 198504

    Valentin G. Semenov

  6. Department of Physics and Materials Science, The University of Memphis, Memphis, TN, 38152, USA

    Sanjay R. Mishra & Md Farhan Azim

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  7. Md Farhan Azim
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  8. A. K. Srivastava
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Contributions

MT: Investigation, Formal analysis, Data curation, Writing—original draft, Data analysis and Curation, Software, Original Drafting. CS: Conceptualization, Investigation, Methodology, Data Curation, Writing—review and editing. AKS: Investigation, Data Analysis. SRM and MFA: Performed XRD and FTIR Characterization. KDM, IVB, VGS, VIP: Performed SEM, Mössbauer and VSM Measurements.

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Correspondence to Charanjeet Singh or A. K. Srivastava.

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Thakur, M., Singh, C., Martinson, K.D. et al. Significantly improved magnetic parameters of Co–La co-doped strontium hexagonal ferrites for recording applications: structural, hysteresis, and mössbauer performance metrics. J Mater Sci: Mater Electron 34, 2002 (2023). https://doi.org/10.1007/s10854-023-11328-3

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