Growth and magnetic properties of ferromagnetic Co nanorods filled inside carbon nanotubes towards nanoscale spintronics

Yasuhiko Hayashi, T. Fujita, T. Tokunaga, N. L. Rupesinghe, K. B K Teo, G. A J Amaratunga, M. Tanemura

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We synthesize Co nanorod filled inside multi-walled CNTs (MWCNTs) by microwave plasma enhanced chemical vapor deposition (MPECVD) and utilize off-axis electron holography to observe the remanent states of the filled metal nanorod inside MWCNTs at room. The MWCNTs grew up to 100-110 nm in diameter and 1.5-1.7 μm in length. The typical bright-field transmission electron microscope (TEM) images revealed both Co/Pd multisegment nanorod and Co nanorod filled inside MWCNTs on the same substrate. We have also performed energy-dispersive X-ray spectrometer (EDS) measurements to characterize the composition of metal filled inside MWCNTs. Based on high-resolution TEM measurements, we observed the face-centered-cubic (fcc) Co filled inside MWCNT. The component of magnetic induction was then measured to be 1.2±0.1 T, which is lower than the expected saturation magnetization of fcc Co of 1.7 T. The partial oxidation of the ferromagnetic metal during the process and the magnetization direction may play an important role in the determination of the quality of the remanent states.

Original languageEnglish
Title of host publication2008 2nd IEEE International Nanoelectronics Conference, INEC 2008
Pages1051-1055
Number of pages5
DOIs
Publication statusPublished - 2008
Externally publishedYes
Event2008 2nd IEEE International Nanoelectronics Conference, INEC 2008 - Shanghai, China
Duration: Mar 24 2008Mar 27 2008

Other

Other2008 2nd IEEE International Nanoelectronics Conference, INEC 2008
CountryChina
CityShanghai
Period3/24/083/27/08

Fingerprint

Magnetoelectronics
Nanorods
Carbon nanotubes
Magnetic properties
Electron microscopes
Electron holography
X ray spectrometers
Ferromagnetic materials
Electromagnetic induction
Saturation magnetization
Plasma enhanced chemical vapor deposition
Metals
Energy dispersive spectroscopy
Magnetization
Microwaves
Oxidation
Substrates
Chemical analysis

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this

Hayashi, Y., Fujita, T., Tokunaga, T., Rupesinghe, N. L., Teo, K. B. K., Amaratunga, G. A. J., & Tanemura, M. (2008). Growth and magnetic properties of ferromagnetic Co nanorods filled inside carbon nanotubes towards nanoscale spintronics. In 2008 2nd IEEE International Nanoelectronics Conference, INEC 2008 (pp. 1051-1055). [4585664] https://doi.org/10.1109/INEC.2008.4585664

Growth and magnetic properties of ferromagnetic Co nanorods filled inside carbon nanotubes towards nanoscale spintronics. / Hayashi, Yasuhiko; Fujita, T.; Tokunaga, T.; Rupesinghe, N. L.; Teo, K. B K; Amaratunga, G. A J; Tanemura, M.

2008 2nd IEEE International Nanoelectronics Conference, INEC 2008. 2008. p. 1051-1055 4585664.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Hayashi, Y, Fujita, T, Tokunaga, T, Rupesinghe, NL, Teo, KBK, Amaratunga, GAJ & Tanemura, M 2008, Growth and magnetic properties of ferromagnetic Co nanorods filled inside carbon nanotubes towards nanoscale spintronics. in 2008 2nd IEEE International Nanoelectronics Conference, INEC 2008., 4585664, pp. 1051-1055, 2008 2nd IEEE International Nanoelectronics Conference, INEC 2008, Shanghai, China, 3/24/08. https://doi.org/10.1109/INEC.2008.4585664
Hayashi Y, Fujita T, Tokunaga T, Rupesinghe NL, Teo KBK, Amaratunga GAJ et al. Growth and magnetic properties of ferromagnetic Co nanorods filled inside carbon nanotubes towards nanoscale spintronics. In 2008 2nd IEEE International Nanoelectronics Conference, INEC 2008. 2008. p. 1051-1055. 4585664 https://doi.org/10.1109/INEC.2008.4585664
Hayashi, Yasuhiko ; Fujita, T. ; Tokunaga, T. ; Rupesinghe, N. L. ; Teo, K. B K ; Amaratunga, G. A J ; Tanemura, M. / Growth and magnetic properties of ferromagnetic Co nanorods filled inside carbon nanotubes towards nanoscale spintronics. 2008 2nd IEEE International Nanoelectronics Conference, INEC 2008. 2008. pp. 1051-1055
@inproceedings{8841f60351384a7d8d254685a88f5d5b,
title = "Growth and magnetic properties of ferromagnetic Co nanorods filled inside carbon nanotubes towards nanoscale spintronics",
abstract = "We synthesize Co nanorod filled inside multi-walled CNTs (MWCNTs) by microwave plasma enhanced chemical vapor deposition (MPECVD) and utilize off-axis electron holography to observe the remanent states of the filled metal nanorod inside MWCNTs at room. The MWCNTs grew up to 100-110 nm in diameter and 1.5-1.7 μm in length. The typical bright-field transmission electron microscope (TEM) images revealed both Co/Pd multisegment nanorod and Co nanorod filled inside MWCNTs on the same substrate. We have also performed energy-dispersive X-ray spectrometer (EDS) measurements to characterize the composition of metal filled inside MWCNTs. Based on high-resolution TEM measurements, we observed the face-centered-cubic (fcc) Co filled inside MWCNT. The component of magnetic induction was then measured to be 1.2±0.1 T, which is lower than the expected saturation magnetization of fcc Co of 1.7 T. The partial oxidation of the ferromagnetic metal during the process and the magnetization direction may play an important role in the determination of the quality of the remanent states.",
author = "Yasuhiko Hayashi and T. Fujita and T. Tokunaga and Rupesinghe, {N. L.} and Teo, {K. B K} and Amaratunga, {G. A J} and M. Tanemura",
year = "2008",
doi = "10.1109/INEC.2008.4585664",
language = "English",
isbn = "9781424415731",
pages = "1051--1055",
booktitle = "2008 2nd IEEE International Nanoelectronics Conference, INEC 2008",

}

TY - GEN

T1 - Growth and magnetic properties of ferromagnetic Co nanorods filled inside carbon nanotubes towards nanoscale spintronics

AU - Hayashi, Yasuhiko

AU - Fujita, T.

AU - Tokunaga, T.

AU - Rupesinghe, N. L.

AU - Teo, K. B K

AU - Amaratunga, G. A J

AU - Tanemura, M.

PY - 2008

Y1 - 2008

N2 - We synthesize Co nanorod filled inside multi-walled CNTs (MWCNTs) by microwave plasma enhanced chemical vapor deposition (MPECVD) and utilize off-axis electron holography to observe the remanent states of the filled metal nanorod inside MWCNTs at room. The MWCNTs grew up to 100-110 nm in diameter and 1.5-1.7 μm in length. The typical bright-field transmission electron microscope (TEM) images revealed both Co/Pd multisegment nanorod and Co nanorod filled inside MWCNTs on the same substrate. We have also performed energy-dispersive X-ray spectrometer (EDS) measurements to characterize the composition of metal filled inside MWCNTs. Based on high-resolution TEM measurements, we observed the face-centered-cubic (fcc) Co filled inside MWCNT. The component of magnetic induction was then measured to be 1.2±0.1 T, which is lower than the expected saturation magnetization of fcc Co of 1.7 T. The partial oxidation of the ferromagnetic metal during the process and the magnetization direction may play an important role in the determination of the quality of the remanent states.

AB - We synthesize Co nanorod filled inside multi-walled CNTs (MWCNTs) by microwave plasma enhanced chemical vapor deposition (MPECVD) and utilize off-axis electron holography to observe the remanent states of the filled metal nanorod inside MWCNTs at room. The MWCNTs grew up to 100-110 nm in diameter and 1.5-1.7 μm in length. The typical bright-field transmission electron microscope (TEM) images revealed both Co/Pd multisegment nanorod and Co nanorod filled inside MWCNTs on the same substrate. We have also performed energy-dispersive X-ray spectrometer (EDS) measurements to characterize the composition of metal filled inside MWCNTs. Based on high-resolution TEM measurements, we observed the face-centered-cubic (fcc) Co filled inside MWCNT. The component of magnetic induction was then measured to be 1.2±0.1 T, which is lower than the expected saturation magnetization of fcc Co of 1.7 T. The partial oxidation of the ferromagnetic metal during the process and the magnetization direction may play an important role in the determination of the quality of the remanent states.

UR - http://www.scopus.com/inward/record.url?scp=52649131429&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=52649131429&partnerID=8YFLogxK

U2 - 10.1109/INEC.2008.4585664

DO - 10.1109/INEC.2008.4585664

M3 - Conference contribution

SN - 9781424415731

SP - 1051

EP - 1055

BT - 2008 2nd IEEE International Nanoelectronics Conference, INEC 2008

ER -