Abstract

Cd/CdO submicron particle sets (Ps) with average particle sizes of about 1 μm were prepared by using the modified levitation-jet method through condensation of metallic cadmium vapor in helium gas flow with an appropriated in situ oxidation. Scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and vibrating sample magnetometry were used for the Ps characterization. Room-temperature ferromagnetism with maximum saturation magnetization up to 37 memu/g was discovered in the Ps with nanostructured polymorphic layered (terraced) morphology. This magnetization has achieved its maximum when CdO content was about 1.2 at.%. Ps with maximum magnetization possessed a certain unit cell volume of the Cd component. It is suggested that the observed ferromagnetic ordering may be related to intrinsic Cd defects in the Cd side of Cd/CdO interface areas.

中文翻译：

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纳米亚微米Cd / CdO颗粒中的室温铁磁性

摘要

通过使用改进的悬浮喷射方法，通过氦气流中金属镉蒸气的冷凝和适当的原位氧化，使用改良的悬浮喷射方法制备了平均粒径约为1μm的Cd / CdO亚微米颗粒组（Ps）。Ps表征采用扫描电子显微镜，X射线衍射，X射线光电子能谱和振动样品磁强法。在具有纳米结构多晶层状（梯形）形态的Ps中发现了具有最大饱和磁化强度高达37memu / g的室温铁磁性。当CdO含量约为1.2 at。％时，该磁化强度达到最大值。具有最大磁化强度的Ps具有一定的Cd晶胞体积。