A series of Gd⁺³-substituted nanocrystalline Ni-Zn ferrites Ni_1-xZn_xGd_0.1Fe_1.9O₄ (0 ≤ x ≤ 1) are prepared using a low-temperature citrate auto-combustion method. The cation distribution obtained using powder x-ray diffraction demonstrates an increase in hopping length between magnetic and Zn⁺² ions. Cation–oxygen vibrations are identified by FTIR spectra. Effect of Zn⁺² ion on the magnetic properties at room temperature is determined from the magnetic moment measured through a vibrating sample magnetometer. The magnetic moment and saturation magnetization obey Yafet–Kittel type magnetization with the highest saturation magnetization for x = 0.2 (≈ 54 emu/g). The low squareness ratio of the samples (0.25–0.12) confirms the uniaxial anisotropy.

中文翻译：

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Gd +3取代的Ni-Zn纳米铁氧体的阳离子分布和磁性能

一系列的Gd ³ -取代的纳米晶的Ni-Zn铁氧体的Ni _{1- X}锌_X的Gd _0.1铁_1.9 ø ₄（0≤  X 使用低温柠檬酸自燃烧方法制备≤1）。使用粉末X射线衍射获得的阳离子分布表明，磁性离子和Zn ⁺²离子之间的跳变长度增加。阳离子氧振动通过FTIR光谱识别。锌^+2的作用室温下磁性的离子取决于通过振动样品磁力计测得的磁矩。磁矩和饱和磁化强度遵循Yafet–Kittel型磁化强度，其中x  = 0.2（≈54 emu / g）时具有最高饱和磁化强度。样品的低矩形比（0.25-0.12）证实了单轴各向异性。