Cooperation effect of indium and vanadium co-doped into bismuth-iron garnets on magnetic properties

Abstract For achieving tunable saturation magnetization and line width, different cations were doped into the YIG-based garnets, which standard molecular formula could be expressed as A 3 [Fe 2−x M x ](Fe 3−y N y )O 12 . Most researchers have reported a single rule of one element doping (x or y) on its magnetic properties. However, cooperation effect + to contribution was not clearly clarified. In this work, multi-doped bismuth-iron garnets {Bi 0.84 Ca 2.16 }[Fe V = 0.72–0.14 1.24–1.38) with low magnetizations (4 πM s 200–600 Gs at 298 K) prepared by conventional fluxing agent method. The 3+ 5+ co-doped (BIG) their structures properties systematically investigated using XPS, TEM VSM. It found that total concentration decreasing regardless increasing (y) (x). As-synthesized BIG presented well single-crystal structure, lattice spacing decrease in accompanying transition dislocations from point defects edge dislocations. Both linear increase Curie temperature 4 revealed. mechanism attributed non-magnetic ions reduce average nearest-neighbor coordination irons for oxygen weaken anti-ferromagnetic super-exchange interactions among within namely dilution effect. By comparison, concentraions higher than previous works, tailorable ferrite reported. Here we revealed controllable concentrations ≥ 1.52). These findings will provided more opportunities applications microwave devices.