文章基本信息

标题：Tuning the Growth Pattern in 2D Confinement Regime of Sm₂O₃ and the Emerging Room Temperature Unusual Superparamagnetism
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作者：Amit K. Guria ; Koushik Dey ; Suresh Sarkar 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2014
卷号：4
DOI：10.1038/srep06514
出版社：Springer Nature
摘要：Programming the reaction chemistry for superseding the formation of Sm₂O₃ in a competitive process of formation and dissolution, the crystal growth patterns are varied and two different nanostructures of Sm₂O₃ in 2D confinement regime are designed. Among these, the regular and self-assembled square platelets nanostructures exhibit paramagnetic behavior analogous to the bulk Sm₂O₃. But, the other one, 2D flower like shaped nanostructure, formed by irregular crystal growth, shows superparamagnetism at room temperature which is unusual for bulk paramagnet. It has been noted that the variation in the crystal growth pattern is due to the difference in the binding ability of two organic ligands, oleylamine and oleic acid, used for the synthesis and the magnetic behavior of the nanostructures is related to the defects incorporated during the crystal growth. Herein, we inspect the formation chemistry and plausible origin of contrasting magnetism of these nanostructures of Sm₂O₃.