Quantum mechanics

Anisotropy

Magnetic field

Magnetization

Metallurgy

Materials science

Chromatography

Ferromagnetism

Nuclear magnetic resonance

Crystal structure

Remanence

Physics

Dielectric

Crystallite

Optics

Magnetocrystalline anisotropy

Condensed matter physics

Analytical Chemistry (journal)

Crystallography

Curie temperature

Chemistry

Ferrimagnetism

Magnetic anisotropy

Optoelectronics

Rietveld refinement

Scientific Reports

Indium-substituted strontium hexaferrites were prepared by the conventional solid-phase reaction method. Neutron diffraction patterns were obtained at room temperature and analyzed using the Rietveld methods. A linear dependence of the unit cell parameters is found. In 3+ cations are located mainly in octahedral positions of 4f VI and 12 k. The average crystallite size varies within 0.84–0.65 μm. With increasing substitution, the T C Curie temperature decreases monotonically down to ~ 520 K. ZFC and FC measurements showed a frustrated state. Upon substitution, the average and maximum sizes of ferrimagnetic clusters change in the opposite direction. The M r remanent magnetization decreases down to ~ 20.2 emu/g at room temperature. The M s spontaneous magnetization and the k eff effective magnetocrystalline anisotropy constant are determined. With increasing substitution, the maximum of the ε / real part of permittivity decreases in magnitude from ~ 3.3 to ~ 1.9 and shifts towards low frequencies from ~ 45.5 GHz to ~ 37.4 GHz. The maximum of the tg(α) dielectric loss tangent decreases from ~ 1.0 to ~ 0.7 and shifts towards low frequencies from ~ 40.6 GHz to ~ 37.3 GHz. The low-frequency maximum of the μ / real part of permeability decreases from ~ 1.8 to ~ 0.9 and slightly shifts towards high frequencies up to ~ 34.7 GHz. The maximum of the tg(δ) magnetic loss tangent decreases from ~ 0.7 to ~ 0.5 and shifts slightly towards low frequencies from ~ 40.5 GHz to ~ 37.7 GHz. The discussion of microwave properties is based on the saturation magnetization, natural ferromagnetic resonance and dielectric polarization types.

Features of structure, magnetic state and electrodynamic performance of SrFe12−xInxO19