Abstract
Cax+yY3−x−ySnxZryFe5−x−yO12 powders were synthesized by a citric acid combustion method. The phase, microstructure and ferromagnetic resonance linewidth (ΔH) of the powders were analyzed. Pure garnet phase Y3Fe5O12 could be obtained at 1,200 °C, except for YFeO3 phase appearing in the sample with x = 0.5, y = 0.2. The addition of Zr4+ ion and Sn4+ ion could lower ΔH by replacing Fe3+ ion, which could change the a–d superexchange interaction in YIG lattice. Moreover, Zr4+ ion could promote this replacement by enlarging the lattice. However, too much addition of Zr4+ ion would bring the second phase YFeO3. The sample of Ca0.76Y2.24Sn0.7Zr0.06Fe4.34O12 shows excellent properties which are Ms = 6.4 emu/g, Hc = 10.9 Oe, ΔH = 113 Gs.
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