Abstract We have undertaken a comparative study on the effect of Li-doping on the magnetic property of Cu(OH)2-CuO composite. A simple chemical solution route is used to synthesize the doped and undoped composite samples, while the structural characterization was investigated using X-ray Diffraction studies. With 1% Li-doping in Cu(OH)2-CuO, we discover dramatic changes in the magnetic features of both CuO and Cu(OH)2, which is directly reflected in the temperature-dependent magnetic susceptibility and field-dependent magnetization curves. It is found that the antiferromagnetic transition temperature for monoclinic CuO is reduced from 230 to 216 K while the same in contrast is enhanced from 55 to ~85 K for orthorhombic Cu(OH)2 upon Li-doping in Cu(OH)2-CuO. More importantly, the shape of the magnetic susceptibility curve, as observed in Li doped Cu(OH)2-CuO, indicates the weakening of the quasi-1D property of CuO. The present study demonstrates that the underlying magnetism (dimensionality as well as collective magnetic ordering) for both CuO and Cu(OH)2 in Cu(OH)2-CuO can be tailored by Li-substitution.

中文翻译：

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未掺杂和掺杂锂的 Cu(OH)2-CuO 磁性能的比较研究

摘要 我们对Li掺杂对Cu(OH)2-CuO复合材料磁性能的影响进行了对比研究。使用简单的化学溶液途径合成掺杂和未掺杂的复合样品，同时使用 X 射线衍射研究研究结构表征。在 Cu(OH)2-CuO 中掺杂 1% 的 Li，我们发现 CuO 和 Cu(OH)2 的磁特性发生了巨大变化，这直接反映在温度相关的磁化率和场相关的磁化曲线中. 结果表明，在 Cu(OH)2-CuO 中掺杂锂后，单斜 CuO 的反铁磁转变温度从 230 K 降低到 216 K，而斜方 Cu(OH)2 的反铁磁转变温度从 55 K 提高到 ~85 K . 更重要的是，磁化率曲线的形状，如在 Li 掺杂的 Cu(OH)2-CuO 中观察到的那样，表明 CuO 的准一维特性减弱。本研究表明，Cu(OH)2-CuO 中 CuO 和 Cu(OH)2 的潜在磁性（维数以及集体磁序）可以通过锂取代进行调整。