Crystallographically driven magnetic behaviour of arrays of monocrystalline Co nanowires

Yurii P. Ivanov; Daniel G. Trabada; Andrey L. Chuvilin; Jürgen Kosel; Oksana A. Chubykalo-Fesenko; Manuel M. Vázquez.

doi:10.1088/0957-4484/25/47/475702

Crystallographically driven magnetic behaviour of arrays of monocrystalline Co nanowires

Yurii P. Ivanov, Daniel G. Trabada, Andrey L. Chuvilin, Jürgen Kosel, Oksana A. Chubykalo-Fesenko, Manuel M. Vázquez.

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

47 Scopus citations

Abstract

Cobalt nanowires, 40 nm in diameter and several micrometers long, have been grown by controlled electrodeposition into ordered anodic alumina templates. The hcp crystal symmetry is tuned by a suitable choice of the electrolyte pH (between 3.5 and 6.0) during growth. Systematic high resolution transmission electron microscopy imaging and analysis of the electron diffraction patterns reveals a dependence of crystal orientation from electrolyte pH. The tailored modification of the crystalline signature results in the reorientation of the magnetocrystalline anisotropy and increasing experimental coercivity and squareness with decreasing polar angle of the 'c' growth axis. Micromagnetic modeling of the demagnetization process and its angular dependence is in agreement with the experiment and allows us to establish the change in the character of the magnetization reversal: from quasi-curling to vortex domain wall propagation modes when the crystal 'c' axis tilts more than 75° in respect to the nanowire axis.

Original language	English (US)
Pages (from-to)	475702
Journal	Nanotechnology
Volume	25
Issue number	47
DOIs	https://doi.org/10.1088/0957-4484/25/47/475702
State	Published - Nov 7 2014

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: Financial support from the Spanish Ministry of Science and Innovation, MCINN, under Project No. MAT2010-20798C05-01 and FIS2010-20979-C02-02 is acknowledged, as well as of the Far Eastern Federal University. A Chuvilin acknowledges the financial support from the Basque Government within the projects CTP11-P14 and Etortek IE11-304. Yu P Ivanov thanks the financial support provided by SABIC. Thanks are due also to C Checa and A Valera for assistance in the SEM characterization.

ASJC Scopus subject areas

Bioengineering
Mechanics of Materials
General Materials Science
General Chemistry
Mechanical Engineering
Electrical and Electronic Engineering

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10.1088/0957-4484/25/47/475702

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title = "Crystallographically driven magnetic behaviour of arrays of monocrystalline Co nanowires",

abstract = "Cobalt nanowires, 40 nm in diameter and several micrometers long, have been grown by controlled electrodeposition into ordered anodic alumina templates. The hcp crystal symmetry is tuned by a suitable choice of the electrolyte pH (between 3.5 and 6.0) during growth. Systematic high resolution transmission electron microscopy imaging and analysis of the electron diffraction patterns reveals a dependence of crystal orientation from electrolyte pH. The tailored modification of the crystalline signature results in the reorientation of the magnetocrystalline anisotropy and increasing experimental coercivity and squareness with decreasing polar angle of the 'c' growth axis. Micromagnetic modeling of the demagnetization process and its angular dependence is in agreement with the experiment and allows us to establish the change in the character of the magnetization reversal: from quasi-curling to vortex domain wall propagation modes when the crystal 'c' axis tilts more than 75° in respect to the nanowire axis.",

author = "Ivanov, {Yurii P.} and Trabada, {Daniel G.} and Chuvilin, {Andrey L.} and J{\"u}rgen Kosel and Chubykalo-Fesenko, {Oksana A.} and V{\'a}zquez., {Manuel M.}",

note = "KAUST Repository Item: Exported on 2020-10-01 Acknowledgements: Financial support from the Spanish Ministry of Science and Innovation, MCINN, under Project No. MAT2010-20798C05-01 and FIS2010-20979-C02-02 is acknowledged, as well as of the Far Eastern Federal University. A Chuvilin acknowledges the financial support from the Basque Government within the projects CTP11-P14 and Etortek IE11-304. Yu P Ivanov thanks the financial support provided by SABIC. Thanks are due also to C Checa and A Valera for assistance in the SEM characterization.",

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AU - Ivanov, Yurii P.

AU - Trabada, Daniel G.

AU - Chuvilin, Andrey L.

AU - Kosel, Jürgen

AU - Chubykalo-Fesenko, Oksana A.

AU - Vázquez., Manuel M.

N1 - KAUST Repository Item: Exported on 2020-10-01 Acknowledgements: Financial support from the Spanish Ministry of Science and Innovation, MCINN, under Project No. MAT2010-20798C05-01 and FIS2010-20979-C02-02 is acknowledged, as well as of the Far Eastern Federal University. A Chuvilin acknowledges the financial support from the Basque Government within the projects CTP11-P14 and Etortek IE11-304. Yu P Ivanov thanks the financial support provided by SABIC. Thanks are due also to C Checa and A Valera for assistance in the SEM characterization.

PY - 2014/11/7

Y1 - 2014/11/7

N2 - Cobalt nanowires, 40 nm in diameter and several micrometers long, have been grown by controlled electrodeposition into ordered anodic alumina templates. The hcp crystal symmetry is tuned by a suitable choice of the electrolyte pH (between 3.5 and 6.0) during growth. Systematic high resolution transmission electron microscopy imaging and analysis of the electron diffraction patterns reveals a dependence of crystal orientation from electrolyte pH. The tailored modification of the crystalline signature results in the reorientation of the magnetocrystalline anisotropy and increasing experimental coercivity and squareness with decreasing polar angle of the 'c' growth axis. Micromagnetic modeling of the demagnetization process and its angular dependence is in agreement with the experiment and allows us to establish the change in the character of the magnetization reversal: from quasi-curling to vortex domain wall propagation modes when the crystal 'c' axis tilts more than 75° in respect to the nanowire axis.

AB - Cobalt nanowires, 40 nm in diameter and several micrometers long, have been grown by controlled electrodeposition into ordered anodic alumina templates. The hcp crystal symmetry is tuned by a suitable choice of the electrolyte pH (between 3.5 and 6.0) during growth. Systematic high resolution transmission electron microscopy imaging and analysis of the electron diffraction patterns reveals a dependence of crystal orientation from electrolyte pH. The tailored modification of the crystalline signature results in the reorientation of the magnetocrystalline anisotropy and increasing experimental coercivity and squareness with decreasing polar angle of the 'c' growth axis. Micromagnetic modeling of the demagnetization process and its angular dependence is in agreement with the experiment and allows us to establish the change in the character of the magnetization reversal: from quasi-curling to vortex domain wall propagation modes when the crystal 'c' axis tilts more than 75° in respect to the nanowire axis.

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Crystallographically driven magnetic behaviour of arrays of monocrystalline Co nanowires

Abstract

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