Abstract We report the magnetic properties of Zn-substituted barium Y-type hexaferrites with the Zn substituent, x, ranging from 0.5 to 2.0 in Ba2ZnxFe2−xFe12O22. After high-temperature annealing and subsequent furnace-cooling, single-phase samples with x = 0.5, 1.0, 1.5 could be successfully prepared in a reduced oxygen atmosphere (PO2 = 10−3 atm) while the single-phase was obtainable only from the sample with x = 2.0 in air. With increasing x from 0.5 to 2.0, both a lattice parameters (≈0.32%) and unit cell volumes (Vcell) (≈0.51%) were linearly increased but c lattice parameters (≈0.12%) were linearly decreased, which is in good agreement with the Vegard’s law, indirectly supporting a successful formation of Ba2ZnxFe2−xFe12O22-type solid solutions. The saturation magnetization (Ms) was first increased with increasing x from 0.5 to 1.0 and then decreased up to x = 2.0. Thus, the highest Ms value of 44.7 emu/g was obtainable from the sample of x = 1.0 sintered at 1300 °C for 2 h in the low PO2 of 10−3 atm. These results are attributable to the site preference of Zn2+ ions for the tetrahedral sites of Y-type hexaferrites.

中文翻译：

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Zn 取代 Y 型六铁氧体 Ba2Zn Fe2-Fe12O22 的磁性能

摘要 我们报告了在 Ba2ZnxFe2−xFe12O22 中具有 Zn 取代基 x 范围从 0.5 到 2.0 的 Zn 取代的 Y 型六铁氧体钡的磁性。经过高温退火和随后的炉冷，可以在还原氧气氛（PO2 = 10-3 atm）中成功制备 x = 0.5、1.0、1.5 的单相样品，而单相样品只能从空气中 x = 2.0 的样品。随着 x 从 0.5 增加到 2.0，a 晶格参数 (≈0.32%) 和晶胞体积 (Vcell) (≈0.51%) 均线性增加，但 c 晶格参数 (≈0.12%) 线性降低，这非常吻合根据 Vegard 定律，间接支持 Ba2ZnxFe2-xFe12O22 型固溶体的成功形成。随着 x 从 0.5 增加到 1，饱和磁化强度 (Ms) 首先增加。0 然后减少到 x = 2.0。因此，44.7 emu/g 的最高 Ms 值可从 x = 1.0 的样品中获得，该样品在 1300 °C 下在 10-3 atm 的低 PO2 下烧结 2 小时。这些结果归因于 Zn2+ 离子对 Y 型六铁氧体四面体位点的位点偏好。