To tune the coercivity of Fe-filled carbon-nanotube (CNT) arrays, the shape anisotropy of encapsulated Fe nanoparticles (Fe-NPs) was investigated. Four Fe-filled CNT-array samples with different Fe-NP aspect ratios were prepared by catalytic pyrolysis of acetylene using ferrocene as catalyst. The coercivity of the Fe-filled CNT arrays increased from to at room temperature when the mean aspect ratio of the encapsulated Fe-NPs changed from 1.6 to 6.0. This clear dependence of the coercivity of the Fe-filled CNT arrays on the aspect ratio of the Fe-NPs might be interpreted in terms of the Stoner–Wohlfarth model. This result indicates that changing the shape anisotropy of the encapsulated Fe-NPs is an effective method to tune the coercivity of the Fe-filled CNTs.
Skip Nav Destination
,
Article navigation
1 August 2008
Research Article|
August 07 2008
Tuning the coercivity of Fe-filled carbon-nanotube arrays by changing the shape anisotropy of the encapsulated Fe nanoparticles
C. X. Shi;
C. X. Shi
Shenyang National Laboratory for Materials Science, Institute of Metal Research,
Chinese Academy of Sciences
, Shenyang 110016, People’s Republic of China
Search for other works by this author on:
H. T. Cong
H. T. Cong
a)
Shenyang National Laboratory for Materials Science, Institute of Metal Research,
Chinese Academy of Sciences
, Shenyang 110016, People’s Republic of China
Search for other works by this author on:
C. X. Shi
H. T. Cong
a)
Shenyang National Laboratory for Materials Science, Institute of Metal Research,
Chinese Academy of Sciences
, Shenyang 110016, People’s Republic of China
a)
Electronic mail: [email protected].
J. Appl. Phys. 104, 034307 (2008)
Article history
Received:
February 01 2008
Accepted:
June 09 2008
Citation
C. X. Shi, H. T. Cong; Tuning the coercivity of Fe-filled carbon-nanotube arrays by changing the shape anisotropy of the encapsulated Fe nanoparticles. J. Appl. Phys. 1 August 2008; 104 (3): 034307. https://doi.org/10.1063/1.2966688
Download citation file:
Pay-Per-View Access
$40.00
Sign In
You could not be signed in. Please check your credentials and make sure you have an active account and try again.
Citing articles via
A step-by-step guide to perform x-ray photoelectron spectroscopy
Grzegorz Greczynski, Lars Hultman
Piezoelectric thin films and their applications in MEMS: A review
Jinpeng Liu, Hua Tan, et al.
Decoding diffraction and spectroscopy data with machine learning: A tutorial
D. Vizoso, R. Dingreville
Related Content
Enhanced magnetism in Fe-filled carbon nanotubes produced by pyrolysis of ferrocene
J. Appl. Phys. (October 2005)
Controlling the quantity of α-Fe inside multiwall carbon nanotubes filled with Fe-based crystals: The key role of vapor flow-rate
Appl. Phys. Lett. (December 2014)
Observation of lamellar like fringes and Barkhausen effects in iron-carbon filled vertically aligned carbon nanotubes
J. Appl. Phys. (December 2018)
Mössbauer morphological analysis of Fe-filled multiwalled carbon nanotube samples
J. Appl. Phys. (October 2006)
Peeling off effects in vertically aligned Fe3C filled carbon nanotubes films grown by pyrolysis of ferrocene
J. Appl. Phys. (June 2017)