Dependence of Thermal Stability of Antiferromagnetic Nanocrystals on Size and Magnetic Proximity Effect
Dependence of Thermal Stability of Antiferromagnetic Nanocrystals on Size and Magnetic Proximity Effect
复制标题
DOI：
10.1021/jp710759m
复制
发表时间：
2008-03
影响因子：
3.7
通讯作者：
X. Lang;Z. Wen;Q. Jiang
中科院分区：
文献类型：
--
作者：
X. Lang;Z. Wen;Q. Jiang
反铁磁（AFM）纳米晶的热稳定性显着不同于他们的大块对应物。为了理解基本的机制和因素，主导的可调谐性的一般趋势，作者已经建立了一个分析和简单的模型的尺寸和磁性邻近效应的AFM纳米晶体的热稳定性。该模型预测了尺寸引起的过冷和过热的AFM纳米晶体在裸纳米粒子，纳米线或纳米棒，和薄膜支持的磁性和磁性基板的尼尔转变。该模型可以重现Ho、NiO、MnO、CuO、Co3O4、CoO、NiF2和FeF2纳米晶的AFM实验结果，无需任何可调参数.
The thermal stabilities of antiferromagnetic (AFM) nanocrystals are dramatically different from those of their bulk counterparts. To understand the underlying mechanisms and factors that dominate the general trend of the tunability, the authors have established an analytic and simple model for the size and magnetic proximity effects on the thermal stability of AFM nanocrystals. This model has predicted size-induced undercooling and superheating in the Neel transition of AFM nanocrystals in bare nanoparticles, nanowires or nanorods, and thin films supported by nonmagnetic and magnetic substrates. The model enables us to reproduce the available experimental results of Ho, NiO, MnO, CuO, Co 3 O 4 , CoO, NiF 2 , and FeF 2 AFM nanocrystals without any adjustable parameter.