Abstract
Nanocrystalline aluminum-doped manganese ferrite was synthesized by facile thermal treatment method. Nanostructure-doped ferrite with crystalline size that ranged between 3.71 and 6.35 nm was characterized via X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and vibrating-sample magnetometry (VSM). The Scherrer and Williamson-Hall hypothesis techniques were utilized to determine lattice constants and strain. Various types of structural properties including octahedral and tetrahedral site radius, bond lengths and angles, hopping parameter, oxygen positional parameters, site bonds, and edge lengths were determined from XRD spectrum analysis. Discrepancy in the hypothetically expected angle indicates improvement of A-B superexchange intercommunication. Furthermore, magnetic-hysteresis (M-H) and XPS analysis support the claim of enhancement. The presence of the ionic nature of iron and manganese in ferrite is FeII, FeIII, MnII, and MnIV as revealed by the results of XPS. Moreover, XPS assists in an excellent way to understand the properties such as configuration, chemical nature, and average inversion degree of doped ferrite samples. The spin noncollinearity and exquisite interaction amid the sublattice are responsible for the decrease in the saturation and remnant magnetization determined from the hysteresis loop at ambient temperature with maximum magnetic field of 1.8 T.
Highlights
The transition metal-oriented nanoferrites which consist of unique structural, electrical, thermal, and magnetic characteristics are utilized for various types of engineering and biomedical applications
Manganese ferrite (MnFe2O4) nanoparticles (NPs) with other ferrites are considered as a crucial tool for biomedical applications for enhancing efficiency of magnetic resonance imaging, hyperthermia, and drug delivery [13]
The significance of Al3+ cations as a dopant in nanocrystalline manganese ferrite prepared through the thermal treatment method was discussed
Summary
The transition metal-oriented nanoferrites which consist of unique structural, electrical, thermal, and magnetic characteristics are utilized for various types of engineering and biomedical applications. Manganese ferrite (MnFe2O4) nanoparticles (NPs) with other ferrites are considered as a crucial tool for biomedical applications for enhancing efficiency of magnetic resonance imaging, hyperthermia, and drug delivery [13]. Structural, magnetic, and optical characteristics of ferrites depends upon tetrahedral and octahedral sites occupied by divalent and trivalent cations [21, 22]. It was reported that different types of the preparation method change cation distribution, composition, and crystallinity among tetrahedral and octahedral sites [37,38,39]. Detailed characterization analysis of crystal structural parameter, nanostructure morphology, and quantitative assessment and magnetization characteristics of purified and Al-doped manganese mixed ferrite were reported in this research work
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