Irradiation-induced magnetism in carbon nanostructures
Irradiation-induced magnetism in carbon nanostructures
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DOI：
10.1103/physrevlett.95.097201
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发表时间：
2005-08-26
影响因子：
8.6
通讯作者：
Ajayan, PM
中科院分区：
文献类型：
--
作者：
Talapatra, S;Ganesan, PG;Ajayan, PM
对纳米金刚石（ND）颗粒进行了注入能量为100 keV、不同剂量的氮（N-15）和碳（C-12）离子注入。磁性测量显示掺杂ND在室温下的铁磁磁滞行为。对于大于10（14）cm（-2）的剂量大小，发现N-15植入样本的饱和磁化强度（M-s）高于C-12植入样本。X射线光电子能谱测量的基础上解释的结构修改或缺陷沿着与碳-氮（C-N）键合状态观察到的增强铁磁有序N-15掺杂样品的作用。
Nitrogen (N-15) and carbon (C-12) ion implantations with implant energy of 100 keV for different doses were performed on nanosized diamond (ND) particles. Magnetic measurements on the doped ND show ferromagnetic hysteresis behavior at room temperature. The saturation magnetization (M-s) in the case of N-15 implanted samples was found to be higher compared to the C-12 implanted samples for dose sizes greater than 10(14) cm(-2). The role of structural modification or defects along with the carbon-nitrogen (C-N) bonding states for the observed enhanced ferromagnetic ordering in N-15 doped samples is explained on the basis of x-ray photoelectron spectroscopy measurements.