Department of Cogno-Mechatronics Engineering, Pusan National University, 1268-50, Samnangin-ro, Samnangjin-eup, Miryang 627-706, Republic of Korea.
The Institute of Basic Science, Korea University, Seoul 136-713, Republic of Korea.
Nanoscale Res Lett. 2014 May 7;9(1):221. doi: 10.1186/1556-276X-9-221. eCollection 2014.
Hydrogen-treated ZnCoO shows magnetic behavior, which is related to the formation of Co-H-Co complexes. However, it is not well known how the complexes are connected to each other and with what directional behavior they are ordered. In this point of view, ZnCoO nanowire is an ideal system for the study of the magnetic anisotropy. ZnCoO nanowire was fabricated by trioctylamine solution method under different ambient gases. We found that the oxidation of trioctylamine plays an essential role on the synthesis of high-quality ZnCoO nanowires. The hydrogen injection to ZnCoO nanowires induced ferromagnetism with larger magnetization than ZnCoO powders, while becoming paramagnetic after vacuum heat treatment. Strong ferromagnetism of nanowires can be explained by the percolation of Co-H-Co complexes along the c-axis.
经氢气处理的 ZnCoO 表现出磁行为，这与 Co-H-Co 配合物的形成有关。然而，配合物之间是如何相互连接的，以及它们以什么方向有序，目前还不是很清楚。在这方面，ZnCoO 纳米线是研究磁各向异性的理想体系。我们通过三辛胺溶液法在不同的环境气体下制备了 ZnCoO 纳米线。我们发现三辛胺的氧化对高质量 ZnCoO 纳米线的合成起着至关重要的作用。氢气注入 ZnCoO 纳米线后会诱导出比 ZnCoO 粉末更大的铁磁性，而经过真空热处理后则变成顺磁性。纳米线的强铁磁性可以通过 Co-H-Co 配合物沿 c 轴的渗流来解释。
