Effect of pentavalent vanadium ion doping on magnetic properties of nickel ferrite determined via 57Fe IFNMR and FMR studies

We have synthesized a series of vanadium-doped nickel ferrite samples to investigate the impact of this substitution on the material's magnetic properties. The samples' phase purity has been verified by XRD analysis. Micrographs taken with a SEM instrument show the accelerated development...

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Bibliographic Details
Published in:Journal of alloys and compounds 2024-12, Vol.1009, p.176698, Article 176698
Main Authors: Manjunatha, M., Reddy, G.Srinivasa, S M, Arun Kumar, Thipperudrappa, J., K.J., Mallikarjunaiah, Ramesh, K.P., Bhat, S.V.
Format: Article
Language:English
Subjects:
57Fe IFNMR
FMR
Magnetocrystalline anistropy
NiFe2O4
VSM
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Summary:We have synthesized a series of vanadium-doped nickel ferrite samples to investigate the impact of this substitution on the material's magnetic properties. The samples' phase purity has been verified by XRD analysis. Micrographs taken with a SEM instrument show the accelerated development of the grains. All of the samples are ferrimagnetic, as shown by Vibrating Sample Magnetometry (VSM), but the saturation magnetization (MS) decreases up to (x = 0.20), after which it increases. The samples are also studied by FMR and using the enhanced simulation conditions, the magnetocrystalline anisotropy constant (K1) of nickel ferrite is calculated, and it is found to be in excellent agreement with the previous reports. The effect of anisotropy on the strength of the signal is investigated using 57Fe-IFNMR (echo amplitude). Intriguingly, we have found that the magnetocrystalline anisotropy measured by FMR is inversely correlated with the echo amplitude measured by IFNMR. [Display omitted] •Vanadium-doped nickel ferrite samples were synthesized to investigate their magnetic properties.•XRD and Rietveld refinement confirmed phase purity, and SEM showed accelerated grain growth with increased doping.•VSM confirms ferrimagnetism in all samples, with saturation magnetization decreasing until x = 0.20, then increasing.•Magnetocrystalline anisotropy constant (K1) determined from FMR data shows excellent agreement with earlier theoretical calculations.•Theoretical K1 shows an inverse correlation with echo amplitude measured by 57Fe-IFNMR.
ISSN:0925-8388
DOI:10.1016/j.jallcom.2024.176698