Magnetic field annealing dependent magnetic properties of nanowire arrays

Shamaila, S.; Sharif, Rehana; Chen, Junyang; Liu, H.R.; Han, X. F.

doi:10.1016/j.jmmm.2009.07.081

Cited by 21 publications

(12 citation statements)

References 20 publications

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“…Structural analysis understanding can be used to fabricate crystalline or amorphous nanowires and nanotubes according to the required applications. Shamaila et al, 2008b;Shamaila et al, 2009a;Shamaila et al, 2009b;Sharif et al, 2006;Sharif et al, 2007;Sharif et al, 2008a;Sharif et al, 2008b). Shape and geometry dependent magnetization behaviour of the CoPt nanowires and nanotubes is explained here.…”

Section: Characterizationmentioning

confidence: 95%

“…The formed aluminum oxide layer was then removed by immersing anodized Al into a mixed solution of 0.4 M chromic acid and 0.6 M phosphoric acid solution at 60 o C. Subsequently, the samples were reanodized for different periods of time under the same anodization conditions as in the first step. These self assembled anodic aluminium oxide (AAO) templates were used to fabricate different types of nanowires and nanotubes by electrochemical deposition method Shamaila et al, 2008b;Shamaila et al, 2009b;Sharif et al 2007). …”

Section: Anodization For Aaomentioning

confidence: 99%

“…Electrodeposition was performed in a three-electrode cell under constant voltage at room temperature, where the sputtered conducting layer served as the working electrode, saturated calomel electrode (SCE) reference and a graphite pole was used as counter electrode. The electrolytes for electrodeposition consisted of their respective salts in deionized water as mentioned in the references Shamaila et al, 2008b;Shamaila et al, 2009a;Shamaila et al, 2009b;Sharif et al 2006;Sharif et al 2007;Sharif et al 2008;Sharif et al 2008). The different lengths of nanowires and nanotubes were obtained by adjusting the time of electrodeposition.…”

Section: Fabrication Of Nanowires and Nanotubesmentioning

confidence: 99%

“…These self-assembled AAO templates can be used to fabricate Co, Ni, CoPt, CoFe, CoFeB etc. nanowire arrays by electrochemical deposition method Shamaila et al, 2008b;Shamaila et al, 2009b;Sharif et al 2007). where t w =0 gives nanowire and t w > 0 gives nanotube geometry.…”

Section: Characterizationmentioning

confidence: 99%

“…These SEM images reveal that nanowires with wide range of diameter and lengths, and nanotubes with different external and internal diameter, length and wall thickness can be fabricated by low cost electrodeposition method. The structure analysis of ferromagnetic nanowires and nanotubes is done by HRTEM and selected area electron diffraction (SAED) patterns after releasing the nanowires and nanotubes from the templates (Shamaila et al, 2009b;Sharif et al, 2006;Sharif et al, 2007;Sharif et al, 2006). The XRD is also performed for the structure analysis of nanocylinders Shamaila et al, 2008b;Shamaila et al, 2009b;Sharif et al, 2006;Sharif et al, 2008).…”

Section: Characterizationmentioning

confidence: 99%

See 4 more Smart Citations

Ferromagnetic Nanowires and Nanotubes

Han¹,

Shamaila²,

Sharif³

2010

Electrodeposited Nanowires and Their Applications

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Section: Characterizationmentioning

confidence: 95%

Section: Anodization For Aaomentioning

confidence: 99%

Section: Fabrication Of Nanowires and Nanotubesmentioning

confidence: 99%

Section: Characterizationmentioning

confidence: 99%

Section: Characterizationmentioning

confidence: 99%

See 3 more Smart Citations

Ferromagnetic Nanowires and Nanotubes

Han¹,

Shamaila²,

Sharif³

2010

Electrodeposited Nanowires and Their Applications

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Magnetization reversal in Co‐base nanowire arrays

Vázquez

Vivas

2011

Physica Status Solidi (b)

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The magnetic behaviour of ordered arrays of magnetic nanowires is controlled by the combined action of anisotropy energy terms determined by geometrical shape, crystalline structure and magnetostriction, as well as by the magnetostatic interactions among them. A number of works have been reported on the role of magnetostatic interaction in arrays of nanowires, sometimes focusing on nanowires with vanishing crystalline and magnetostrictive energy terms. Here, in turn we are interested in Co‐base nanowires whose magnetocrystalline anisotropy plays a very important role. Arrays of Co‐base nanowires offer novel, sometimes unexpected behaviour that is not fully understood. Such results are connected to their magnetocrystalline anisotropy, and to their complex magnetization reversal mode. Arrays of Co and Co‐base nanowires have been fabricated by template‐assisted method, by electroplating into highly ordered self‐assembled pores of nanoporous alumina membranes. Their hcp or fcc crystal structure is confirmed to depend on length of nanowires as well as on the presence of selected elements in the composition. The magnetic behaviour of these arrays has been experimentally investigated as a function of (i) geometry (e.g. diameter and, particularly short length) and (ii) composition (e.g. adding Ni or Pd). A complementary study on its temperature dependence reveals the nature of the dominant anisotropy, while the angular dependence of hysteresis loops (e.g. coercivity and remanence) enables a deeper analysis of the magnetization reversal process. Micromagnetic reversal modes are reviewed and modelling and simulations procedures introduced. Complex rotational mechanisms are concluded to be responsible for the reversal process following micromagnetic modes distinct from those pure classically established. SEM image of an array of Co‐base nanowires.

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