Properties of iron nanowires encased in multi-walled carbon nanotubes

被引：1
|
作者：
Shanina, B. D. [2 ]
Kolesnik, S. P. [2 ]
Gavriljuk, V. G. [1 ]
Petrov, Yu N. [1 ]
Sokhatsky, V. P. [3 ]
机构：
[1] GV Kurdyumov Inst Met Phys, UA-03142 Kiev, Ukraine
[2] Inst Semicond Phys, UA-03028 Kiev, Ukraine
[3] TG Shevchenko Kiev Natl Univ, UA-01033 Kiev, Ukraine
来源：
FULLERENES NANOTUBES AND CARBON NANOSTRUCTURES | 2008年 / 16卷 / 5-6期
关键词：
carbon nanotubes; iron; ferromagnetic resonance; electron spin resonance;
D O I：
10.1080/15363830802225341
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The Fe-filled multiwalled carbon nanotubes are studied. The iron within the nanotubes is found to be in three phases: the austenite gamma-Fe is located at the top of the nanotubes, while the ferrite alpha-Fe and cementite theta-Fe3C is found close to the substrate. Two ferromagnetic signals are observed and identified as those belonging to ferrite and cementite. Two paramagnetic signals appear at low temperatures. Based on their temperature behavior and on the values of the g-factors, the first signal is related to localized spin moments and the second one, to free electrons. Ferromagnetic signals reveal surprising temperature dependence: with decreasing temperature, their integral intensity decreases nearly linearly, and the signals disappear at temperatures below 70K. Possible reasons for that are considered.
引用
收藏
页码：357 / 361
页数：5
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