The strong role of incorporation of Co0.3Mn0.7Fe2O4 into methylcellulose for enhancing the coercivity

In this study, x Co _0.3Mn _0.7Fe ₂O ₄- methylcellulose composites ( x = 0.2, 0.4, 0.6, and 0.8 wt%) were prepared. The results show that the spinel structure of Co _0.3Mn _0.7Fe ₂O ₄is well preserved in all samples after incorporation into methylcellulose, indicating that no intermediate phase is formed during composite synthesis. Although the saturation magnetization and remanent magnetization of composite samples are significantly lower than those of pure Co _0.3Mn _0.7Fe ₂O ₄, the coercivity of composite samples is greater than that of pure Co _0.3Mn _0.7Fe ₂O ₄. The coercivity of both 0.6 wt% Co _0.3Mn _0.7Fe ₂O ₄- methylcellulose and 0.8 wt% Co _0.3Mn _0.7Fe ₂O ₄- methylcellulose composites is approximately 35 % higher than the corresponding value of pure Co _0.3Mn _0.7Fe ₂O ₄. As a result, incorporating Co _0.3Mn _0.7Fe ₂O ₄ into methylcellulose is a promising tool for increasing coercivity. This promising effect is expected to be applicable to many magnetic particles. Furthermore, the knowledge gained by attempting to control coercivity in magnetic oxides opens the door to applications that require non-volatility through spintronic devices.