Elucidation of structural, optical, and magnetic properties of Cd/Ni-doped strontium hexaferrite

Abstract

Cd/Ni-substituted strontium hexaferrite SrFe 12−2x Cd x Ni x O 19 (for x = 0.0, 0.1, and 0.2) has been prepared via sol-gel method. The synthesized samples have been sintered at 950 °C. Powder X-ray diffraction (XRD) results establishes the single-phase magnetoplumbite structure. Lattice parameters (a and c), cell volume (V cell ), and crystallite size (D) have been determined. The magnetic characteristics such as saturation magnetization (M s ), retentive magnetization (M r ), and coercive field (H c ) have also been determined from VSM data (hysteresis loop). The value of M s increases, and M r and H c decreases with increase in dopant concentration. FT-IR and Raman analysis establishes the metal-oxygen vibrations present in various sites. UV-Vis-NIR spectra reveals that the synthesized samples are transparent in the entire visible region and hence they can be used in optoelectronic applications. The study reveals that Cd/Ni-substituted strontium hexaferrites are suitable candidates for optoelectronic devices, microwave devices, and recording media.

Tailoring the optical and magnetic properties of La-BaM hexaferrites by Ni substitution

“…In recent years, hexagonal magnetic nanoparticles have attracted great scientific interest due to their potential for use in various technological applications such as permanent magnets, microwave absorbers, highdensity magnetic media, magneto-optic recording media, and stealth technology. [1][2][3][4] Hexagonal ferrites are divided into five sub-categories based on their crystal structure and chemical formula: M-type (AFe 12 O 19 ), W-type (AFe 16 O 27 ), X-type (AFe 28 O 46 ), Y-type (AFe 12 O 22 ), and Z-type (AFe 24 O 41 ), where A is the divalent cation such as Ba 2+ , Sr 2+ , Pb 2+ , Ca 2+ . [5][6][7] Among these, M-type hexaferrites have gained more attention due to their distinguished properties, such as their very high magnetic anisotropy, higher coercivity, higher corrosion resistance, and high thermal and chemical stability.…”

Effect of Cd on Structural, Spectral, Morphological and Dielectric Properties of Sr1-xCdxZn2Fe4O11 R-type Hexaferrites Synthesized via Sol-gel Technique

“…3 demonstrates the variation in the c/a ratio and value of V cell decreases from 422.37 (Å) 3 to 419.33 (Å) 3 . This shift in lattice parameters is attributed to the replacement of strontium (1.18 Å) ions by Cd 2+ (0.97 Å) ions [ 18 ]. Debye Scherrer's formula was used to determine the crystalline size, “D,” of the prepared materials.…”