Magnetoelastic anisotropy induced effects on field and temperature dependent magnetization reversal of Ni nanowires and nanotubes

Naeem Ahmad; J. Y. Chen; W. P. Zhou; D. P. Liu; X. F. Han

doi:10.1007/s10948-010-1016-1

Magnetoelastic anisotropy induced effects on field and temperature dependent magnetization reversal of Ni nanowires and nanotubes

Naeem Ahmad, J. Y. Chen, W. P. Zhou, D. P. Liu, X. F. Han

Electrical and Computer Engineering

Research output: Contribution to journal › Article › peer-review

28 Scopus citations

Abstract

Vertically aligned Ni nanowires and nanotubes have been electrodeposited in alumina templates at room temperature. The detailed study of angular dependent coercivity and squareness demonstrates that the magnetic easy axis of Ni nanowires is perpendicular to that of Ni nanotubes axis. The mechanisms of magnetization reversal in Ni nanowires and Ni nanotubes are found to occur through the nucleation mode with the propagation of transverse domain wall and curling mode, respectively. Field dependant magnetization results at different temperatures have depicted that the magnetocrystalline anisotropy might cause a crossover of easy axis at room temperature to that of low temperature in both Ni nanowires and nanotubes. Furthermore, the variation in temperature dependent coercivity illustrates that the magnetoelastic anisotropy induced by the alumina matrix plays a dominant role in the magnetization reversal of the nanowires and nanotubes at low temperature.

Original language	English (US)
Pages (from-to)	785-792
Number of pages	8
Journal	Journal of Superconductivity and Novel Magnetism
Volume	24
Issue number	1-2
DOIs	https://doi.org/10.1007/s10948-010-1016-1
State	Published - Jan 2011

Bibliographical note

Funding Information:
Acknowledgements The project was supported by the State Key Project of Fundamental Research of Ministry of Science and Technology (MOST, No. 2006CB932200), 2010CB934400 and National Natural Science Foundation (NSFC, Grant No. 10874225), 10934099, 50928101, and 50721001. X.F. Han thanks the partial support of the international joint projects of NSFC-The Royal Society (UK), NSFC-Australia DEST, and JSPS-NSFC, and the partial support of Specific Funding of Discipline and Graduate Education Project of Beijing Municipal Commission of Education and K.C. Wong Education Foundation, Hong Kong. Naeem Ahmad is thankful to the Higher Education Commission of Pakistan (HEC) for the financial support.

Keywords

Curling mode
Magnetization reversal
Magnetoelastic anisotropy
Nucleation mode
Shape anisotropy

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title = "Magnetoelastic anisotropy induced effects on field and temperature dependent magnetization reversal of Ni nanowires and nanotubes",

abstract = "Vertically aligned Ni nanowires and nanotubes have been electrodeposited in alumina templates at room temperature. The detailed study of angular dependent coercivity and squareness demonstrates that the magnetic easy axis of Ni nanowires is perpendicular to that of Ni nanotubes axis. The mechanisms of magnetization reversal in Ni nanowires and Ni nanotubes are found to occur through the nucleation mode with the propagation of transverse domain wall and curling mode, respectively. Field dependant magnetization results at different temperatures have depicted that the magnetocrystalline anisotropy might cause a crossover of easy axis at room temperature to that of low temperature in both Ni nanowires and nanotubes. Furthermore, the variation in temperature dependent coercivity illustrates that the magnetoelastic anisotropy induced by the alumina matrix plays a dominant role in the magnetization reversal of the nanowires and nanotubes at low temperature.",

keywords = "Curling mode, Magnetization reversal, Magnetoelastic anisotropy, Nucleation mode, Shape anisotropy",

author = "Naeem Ahmad and Chen, {J. Y.} and Zhou, {W. P.} and Liu, {D. P.} and Han, {X. F.}",

note = "Funding Information: Acknowledgements The project was supported by the State Key Project of Fundamental Research of Ministry of Science and Technology (MOST, No. 2006CB932200), 2010CB934400 and National Natural Science Foundation (NSFC, Grant No. 10874225), 10934099, 50928101, and 50721001. X.F. Han thanks the partial support of the international joint projects of NSFC-The Royal Society (UK), NSFC-Australia DEST, and JSPS-NSFC, and the partial support of Specific Funding of Discipline and Graduate Education Project of Beijing Municipal Commission of Education and K.C. Wong Education Foundation, Hong Kong. Naeem Ahmad is thankful to the Higher Education Commission of Pakistan (HEC) for the financial support.",

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N1 - Funding Information: Acknowledgements The project was supported by the State Key Project of Fundamental Research of Ministry of Science and Technology (MOST, No. 2006CB932200), 2010CB934400 and National Natural Science Foundation (NSFC, Grant No. 10874225), 10934099, 50928101, and 50721001. X.F. Han thanks the partial support of the international joint projects of NSFC-The Royal Society (UK), NSFC-Australia DEST, and JSPS-NSFC, and the partial support of Specific Funding of Discipline and Graduate Education Project of Beijing Municipal Commission of Education and K.C. Wong Education Foundation, Hong Kong. Naeem Ahmad is thankful to the Higher Education Commission of Pakistan (HEC) for the financial support.

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N2 - Vertically aligned Ni nanowires and nanotubes have been electrodeposited in alumina templates at room temperature. The detailed study of angular dependent coercivity and squareness demonstrates that the magnetic easy axis of Ni nanowires is perpendicular to that of Ni nanotubes axis. The mechanisms of magnetization reversal in Ni nanowires and Ni nanotubes are found to occur through the nucleation mode with the propagation of transverse domain wall and curling mode, respectively. Field dependant magnetization results at different temperatures have depicted that the magnetocrystalline anisotropy might cause a crossover of easy axis at room temperature to that of low temperature in both Ni nanowires and nanotubes. Furthermore, the variation in temperature dependent coercivity illustrates that the magnetoelastic anisotropy induced by the alumina matrix plays a dominant role in the magnetization reversal of the nanowires and nanotubes at low temperature.

AB - Vertically aligned Ni nanowires and nanotubes have been electrodeposited in alumina templates at room temperature. The detailed study of angular dependent coercivity and squareness demonstrates that the magnetic easy axis of Ni nanowires is perpendicular to that of Ni nanotubes axis. The mechanisms of magnetization reversal in Ni nanowires and Ni nanotubes are found to occur through the nucleation mode with the propagation of transverse domain wall and curling mode, respectively. Field dependant magnetization results at different temperatures have depicted that the magnetocrystalline anisotropy might cause a crossover of easy axis at room temperature to that of low temperature in both Ni nanowires and nanotubes. Furthermore, the variation in temperature dependent coercivity illustrates that the magnetoelastic anisotropy induced by the alumina matrix plays a dominant role in the magnetization reversal of the nanowires and nanotubes at low temperature.

KW - Curling mode

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KW - Magnetoelastic anisotropy

KW - Nucleation mode

KW - Shape anisotropy

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Magnetoelastic anisotropy induced effects on field and temperature dependent magnetization reversal of Ni nanowires and nanotubes

Abstract

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Keywords

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