Enhanced magnetic and ferroelectric properties of K-Hf substituted BiFeO3 multiferroics for magnetoelectric data storage applications

Enhanced magnetic and ferroelectric properties have been observed in Hf substituted Bi 0.97 K 0.9 Fe 1− x Hf (3/4) x O 3 (0.00 ≤ x ≤ 0.20) nanocrystalline multiferroics which were synthesized via auto combustion sol-gel method. Citric acid was used as a solvent. Structural investigation confirmed th...

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Bibliographic Details
Published in:Ferroelectrics 2022-10, Vol.599 (1), p.168-177
Main Authors: Sharif, Muhammad Kashif, Khan, Muhammad Azhar, Junaid, Muhammad, Akhter, Muhammad Javed
Format: Article
Language:English
Subjects:
Antiferromagnetism
Citric acid
Cycloids
Data storage
ferroelectric loops
Ferroelectric materials
Ferroelectricity
Magnetic properties
Magnetic saturation
Magnetism
magnetoelectric RAMS
Multiferroic materials
Multiferroics
Nanomaterials
Nanotechnology
Perovskites
Polarization
remanent polarization
saturation magnetization
Sol-gel processes
Substitutes
XRD
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Summary:Enhanced magnetic and ferroelectric properties have been observed in Hf substituted Bi 0.97 K 0.9 Fe 1− x Hf (3/4) x O 3 (0.00 ≤ x ≤ 0.20) nanocrystalline multiferroics which were synthesized via auto combustion sol-gel method. Citric acid was used as a solvent. Structural investigation confirmed the development of pure perovskite rhombohedral distorted phase. The enlargement in cell volume was observed with K-Hf substitution due to lattice distortion and the ionic radii of substituents. Ferroelectric loops showed that maximum polarization (P max ) was inclined from 0.000376 to 0.391 µc/cm 2 as well as remanent polarization (Pr) from 1.000815 to 5.39 µc/cm 2 . This was due to Hf-K contents which altered Fe-O bond length and increase disturbance in FeO 6 octahedra which increase polarization. High values of saturation magnetization (Ms = 4.79 emu/g) and remanent magnetization (Mr = 1.7 emu/g) was attributed to disturbance in antiferromagnetic spin modulated cycloid (λ = 62 nm) structure. Enhancements of magnetic properties along with the formation of P-E loops make these multiferroic nanomaterials the best candidates for magnetoelectric RAMS.
ISSN:0015-0193
1563-5112
DOI:10.1080/00150193.2022.2113649