Low-Temperature Cofired Co/Zr-Cosubstituted M-Type Barium Ferrite

Crystal structure and magneto‐dielectric properties of Co‐Zr co‐substituted Co2Z hexaferrites

“…This is because the Co-Zr substitution also provokes a decrease in the magnetocrystalline anisotropy constant, which is especially pronounced at this point, thereby increasing the 𝜇 ′ value. 19 The variation curves of the magnetic quality factor of the samples are given in Figure 9B. The results show that the magnetic quality factor (Q) of the composites increases until x = 0.03, and then decreases with the substitution, following the same trend as the DC resistivity.…”

“…Therefore, the 𝑀 𝑠 parameter shows an increasing trend. 19 As co-substitution content further increases, the exchange between Fe 3+ -O 2− -Fe 3+ decreases, meanwhile, the Co 2+ ions further occupy the spin-up sites. 23 These lead to a reduction in the net magnetic moment of the samples and therefore a tendency for 𝑀 𝑠 to decrease.…”

“…This is due to the fact that the ionic radii of both Co 2+ (0.745 Å) and Zr 4+ (0.72 Å) are larger than that of Fe 3+ (0.645 Å). 19 No new phases were produced in the samples with the substitution, so the gradual increase in the structural parameters was caused by the introduction of Co 2+ and Zr 4+ ions into the lattice.…”

“…This leads to a decrease in the spin‐down magnetic moment and an increase in the net magnetic moment of the hexaferrite. Therefore, the $${M}_s$$ parameter shows an increasing trend 19 . As co‐substitution content further increases, the exchange between Fe 3+ ‐O 2− ‐Fe 3+ decreases, meanwhile, the Co 2+ ions further occupy the spin‐up sites 23 .…”

“…When the substitution further increases, the $$\mu ^{\prime}$$ value increases slightly. This is because the Co‐Zr substitution also provokes a decrease in the magnetocrystalline anisotropy constant, which is especially pronounced at this point, thereby increasing the $$\mu ^{\prime}$$ value 19 …”