The temperature dependence of the electrical resistivity and the negative magnetoresistance of carbon nanoparticles

被引：12
|
作者：
Romanenko, AI
Anikeeva, OB
Okotrub, AV
Bulusheva, LG
Kuznetsov, VL
Butenko, YV
Chuvilin, AL
Dong, C
Ni, Y
机构：
[1] Russian Acad Sci, Inst Inorgan Chem, Siberian Div, Novosibirsk 630090, Russia
[2] Novosibirsk State Univ, Novosibirsk 630090, Russia
[3] Novosibirsk State Tech Univ, Novosibirsk 630092, Russia
[4] Russian Acad Sci, Boreskov Inst Catalysis, Siberian Div, Novosibirsk 630090, Russia
[5] Chinese Acad Sci, Inst Phys, Natl Lab Superconduct, Beijing 100080, Peoples R China
来源：
PHYSICS OF THE SOLID STATE | 2002年 / 44卷 / 03期
基金：
俄罗斯基础研究基金会;
关键词：
D O I：
10.1134/1.1462682
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Temperature dependences of the electrical resistivity of samples of carbon nanoparticles obtained from nanodiamonds by annealing at 1800, 1900, and 2140 K were studied. The magnetoresistance of these samples was measured at 4.5 K. Data on the positive magnetoresistance obtained in fields above 3 T were used to estimate the mean free path l of carriers at liquid-helium temperature, l similar to 12 Angstrom for a sample annealed at 1800 K, l similar to 80 Angstrom for a sample annealed at 1900 K, and l similar to 18 Angstrom for the case of annealing at 2140 K. The samples annealed at 1800 and 2140 K exhibit a negative magnetoresistance in fields below 2 T. The carrier concentrations n in the samples annealed at 1800 and 2140 K were estimated as n similar to 8 x 10(21) and 3 x 10(21) cm(-3), respectively. (C) 2002 MAIK "Nauka / Interperiodica".
引用
收藏
页码：487 / 489
页数：3
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