Unique magnetism observed in single-wall carbon nanohorns

被引：58

作者：

Bandow, S

Kokai, F

Takahashi, K

Yudasaka, M

Iijima, S

机构：

[1] Meijo Univ, Japan Sci & Technol Corp, Dept Mat Sci & Engn, Tenpaku Ku, Nagoya, Aichi 4688502, Japan

[2] Laser Res Ctr, Inst Res & Innovat, Kashiwa, Chiba 2770861, Japan

[3] NEC Corp Ltd, Japan Sci & Technol Corp, Tsukuba, Ibaraki 3058501, Japan

来源：

APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING | 2001年 / 73卷 / 03期

关键词：

D O I：

10.1007/s003390100794

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The magnetic properties of single-wall carbon nanohorns (SWNH) were studied by electron spin resonance (ESR) and static magnetic susceptibility measurements. The SWNHs were ESR active with linewidth (DeltaH) of similar to 6 G in vacuo at room temperature. DeltaH was susceptible to the partial pressure Of O-2 and became 53 G at I atmospheric pressure of O-2, while the integrated ESR intensity was independent on O-2 pressure and behaved as Curie-like, suggesting an intrinsic ESR origin with localized electron spin character. The diamagnetic susceptibility for SWNHs indicated a value smaller than that of randomly oriented graphite by an order of magnitude, but showing a magnitude comparable to those Of C-60 and C-70. It is suggested that the large diamagnetism expecting for sp(2) networked carbon materials will be canceled by the Van Vleck constant paramagnetism.

引用

页码：281 / 285

页数：5