Contact induced magnetism in carbon nanotubes

被引:95
作者
Céspedes, O [1 ]
Ferreira, MS [1 ]
Sanvito, S [1 ]
Kociak, M [1 ]
Coey, JMD [1 ]
机构
[1] Trinity Coll Dublin, Dept Phys, Dublin 2, Ireland
关键词
D O I
10.1088/0953-8984/16/10/L06
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
Evidence is presented to show that carbon nanotubes can become magnetized when they are in contact with magnetic material. Spin-polarized charge transfer at the interface between a flat ferromagnetic metal substrate and a multiwalled carbon nanotube leads to a spin transfer of about 0.1 mu(B) per contact carbon atom. The corresponding magnetization is detected by using magnetic force microscopy to probe the stray field in the neighbourhood of the nanotube. Magnetic contrast is observed for carbon nanotubes placed on cobalt or magnetite substrates, but it is absent on silicon, copper or gold substrates. This observation of contact-induced magnetism opens a new avenue for implementing spin-electronics at the molecular level, where the current leads can be separated from the electrodes producing spin polarization.
引用
收藏
页码:L155 / L161
页数:7
相关论文
共 21 条
  • [1] Logic circuits with carbon nanotube transistors
    Bachtold, A
    Hadley, P
    Nakanishi, T
    Dekker, C
    [J]. SCIENCE, 2001, 294 (5545) : 1317 - 1320
  • [2] Ferromagnetism of a graphite nodule from the Canyon Diablo meteorite
    Coey, JMD
    Venkatesan, M
    Fitzgerald, CB
    Douvalis, AP
    Sanders, IS
    [J]. NATURE, 2002, 420 (6912) : 156 - 159
  • [3] Engineering carbon nanotubes and nanotube circuits using electrical breakdown
    Collins, PC
    Arnold, MS
    Avouris, P
    [J]. SCIENCE, 2001, 292 (5517) : 706 - 709
  • [4] Induced magnetic ordering by proton irradiation in graphite -: art. no. 227201
    Esquinazi, P
    Spemann, D
    Höhne, R
    Setzer, A
    Han, KH
    Butz, T
    [J]. PHYSICAL REVIEW LETTERS, 2003, 91 (22)
  • [5] Esquinazi P, 2002, PHYS REV B, V66, DOI 10.1103/PhysRevB.66.024429
  • [6] Contact-induced spin polarization in carbon nanotubes
    Ferreira, MS
    Sanvito, S
    [J]. PHYSICAL REVIEW B, 2004, 69 (03):
  • [7] Observation of intrinsic magnetic domains in C60 polymer
    Han, KH
    Spemann, D
    Höhne, R
    Setzer, A
    Makarova, T
    Esquinazi, P
    Butz, T
    [J]. CARBON, 2003, 41 (04) : 785 - 795
  • [8] Harrison W.A., 1980, Electronic Structure and the Properties of Solids: The Physics of the Chemical Bond
  • [9] Logic gates and computation from assembled nanowire building blocks
    Huang, Y
    Duan, XF
    Cui, Y
    Lauhon, LJ
    Kim, KH
    Lieber, CM
    [J]. SCIENCE, 2001, 294 (5545) : 1313 - 1317
  • [10] Electronics using hybrid-molecular and mono-molecular devices
    Joachim, C
    Gimzewski, JK
    Aviram, A
    [J]. NATURE, 2000, 408 (6812) : 541 - 548