Mg doping effect on the magnetic properties of Y-type hexaferrite Ba0.5Sr1.5Zn2−xMgxFe12O22

摘要: Abstract The microstructure and magnetic properties of Mg-doped Ba0.5Sr1.5Zn2Fe12O22 hexaferrites synthesized by the solid state method are investigated. All undoped doped samples show a sharp screw proper spin phase to collinear ferrimagnetic transition above room temperature, temperature increases distinctly with Mg doping. It is noteworthy that all exhibit another at lower T1, which associated longitudinal conical transition. T1 can be modulated varying content, indicating stabilized Mg-substitution. saturation magnetization maximum content x = 0.8 then decreases x. variations ascribed difference in preferential site for Zn different distribution Fe3+ ions over tetrahedral octahedral sites. worth noting range intermediate-III significantly as x 2.0, suggesting may display field-induced ferroelectric order close RT wide magnetic-field regions. room-temperature M-H curves applied field indicate magnetic-field-induced zero substitution Mg2+ Zn2+. potential candidates applying magnetoelectric devices.