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Structure and magnetic properties of In-substituted MgCd ferrite material

In this paper, low temperature co-fired In-substituted MgCd ferrites (Mg0.8Cd0.2Fe2-xInxO4, x = 0.00, 0.05, 0.10, 0.15) were synthesized by traditional solid state method. XRD showed that In3+ ion not changed phase formation in low doped content. Grain size had obvious changes due to In3+ ions. Under In3+ ion doping, magnetic hysteresis loops showed both saturation magnetization (Ms) first increased and then decreased, and the maximum value was 33.2 emu g−1 (x = 0.10). Coercivity (Hc) decreased first to minimum value(51.99 Oe @x = 0.10) and then increased. The ferromagnetic resonance (FMR) linewidth (ΔH) of samples were tested at 9.56 GHz, and the results showed that the low FMR linewidth was 219.7 Oe when In-doped content was 0.10. the excellent magnetic properties (ΔH, 219.7 Oe @9.56 GHz, Ms, 33.2 emu g−1, Hc, 51.99 Oe) showed that the materials have potential for use in high frequency self-biased microwave electronic devices such as phase shifter or circulators.