Defect clusters in Fe1−xO and their ferrimagnetic properties
Defect clusters in Fe1−xO and their ferrimagnetic properties
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Fe1−xO 中的缺陷簇及其亚铁磁性
DOI：
10.1063/1.372918
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发表时间：
2000
影响因子：
3.2
通讯作者：
A. Simopoulos
中科院分区：
文献类型：
--
作者：
D. Dimitrov;K. Unruh;G. Hadjipanayis;V. Papaefthymiou;A. Simopoulos
在非化学计量的 Fe1−xO 薄膜中观察到亚铁磁性、大饱和磁化强度 (Ms) 和低温矫顽力 (Hc)。这种不寻常的行为归因于尖晶石型缺陷簇的存在，相干地嵌入 Fe3O 基体中。提出了一个模型，该模型解释了 Fe1−xO 的性质，并预测了 Ms 和 Fe1−xO 晶格参数 a 之间的线性相关性，其中 Fe3O4 数据落在同一直线上。实验Ms vs a 曲线与理论预测非常吻合，这表明FeO、Fe1−xO 和Fe3O4 之间存在基本关系。
Ferrimagnetic properties, large saturation magnetization (Ms) and low temperature coercivity (Hc) was observed in nonstoichiometric Fe1−xO films. This unusual behavior was attributed to the existence of spinel type defect clusters coherently embedded in the FeO matrix. A model, which explains the Fe1−xO properties and predicts a linear dependence between Ms and the Fe1−xO lattice parameter a with the Fe3O4 data falling on the same line, is proposed. The experimental Ms vs a curve is in excellent agreement with the theoretical prediction, which indicates the existence of a fundamental relation between FeO, Fe1−xO, and Fe3O4.