Fabrication of Ni2+ and Dy3+ substituted Y-Type nanohexaferrites: A study of structural and magnetic properties

Abstract A series of the Y-type hexaferrites having chemical composition Sr2-xDyxCo2NiyFe12-yO22 (x = 0.0, 0.01, 0.02, 0.03, 0.04 and y = 0.0, 0.1, 0.2, 0.3, 0.4) were fabricated with doping of Dy3+ and Ni2+. XRD patterns confirm the formation of a single-phase hexagonal structure along with some impurity phases. FESEM and TEM analysis shows the formation of agglomerated magnetic nanoparticles. M − H loops obtained from VSM observations were used to study the magnetic parameters viz. saturation magnetization (Ms = 34.285–44.782 emu/g), remanence (Mr = 1.080–11.819 emu/g) and coercivity (Hc = 33.976–246.052 Oe), which were found to increase with an increase in Dy3+/Ni2+ substituents. The synthesized materials with excellent structural and magnetic properties are promising candidates for high-frequency applications.