The magnetodielectric effect in BaTiO₃–SrFe₁₂O₁₉nanocomposites

Crossover of positive and negative magnetoconductance in composites of nanosilica glass containing dual transition metal oxides

“…26,33 In disordered systems, spin-orbit interaction plays inuential role in governing the sign of MR. [34][35][36] Interplay between magnetism and electrical properties was explored in BaTiO 3 -SrFe 12 O 19 nanocomposites. 37 Positive and negative MD effect depending on frequency and temperature was observed in these nanocomposites which may be attributed to the induced internal magnetic eld and space charge/interfacial polarization respectively. The co-existence of positive and negative MD effect has been reported in the system of double perovskite Pr 2 CoMnO 6 .…”

Ferrite Nanostructures Consolidated by Spark Plasma Sintering (SPS)

“…Bismuth ferrite (BFO) and BTO composites, sintered by SPS at temperatures around 800°C, and uniaxial pressures of 50 MPa have been prepared [80] from precursors with an average particle size of 1 µm leading to final microstructures with grain sizes all above 2 µm (Figure 13). Strontium hexaferrite and BTO-based hybrid multiferroics by SPS, starting from nanosized precursors purchased commercially, were investigated [81]. They were fabricated by SPS at a temperature of 900°C, a uniaxial pressure of 75 MPa and a sintering time of 3 min.…”

Influence of post‐synthesis NaCl flux treatment on the magnetic properties of jet‐milled SrFe12O19 powders

“…9 Conventional solidstate synthesis of phase-pure SFO from SrO-Fe 2 O 3 mixtures is challenging due to the narrow compositional range of stability of M-type phase. 2,10,11 Minor deviations in the pro-portion of the precursors can result in incomplete reaction, thereby leaving Fe 2 O 3 as the major secondary phase. 2 The formation of SFO phase is a two-step process: conversion of SrO and Fe 2 O 3 to an intermediate perovskite-like SrFeO 2.5 , which subsequently reacts with Fe 2 O 3 to form the hexaferrite SrFe 12 O 19 .…”