Magnetic and structural properties of electrodeposited CoPt and FePt nanowires in nanoporous alumina templates

Dahmane, Y.; Cagnon, Laurent; Voiron, J.; Pairis, Sébastien; Bacia, Maria; Ortega, Leticia; Benbrahim, N.; Kadri, A.

doi:10.1088/0022-3727/39/21/001

Cited by 72 publications

(53 citation statements)

References 29 publications

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“…In addition multi-segment nanowires including; Au/Ni/Au [184] and Co/Cu [172] have been reported. Both binary and ternary alloy nanowire arrays of; CoCr [185], CoPt [186], FePt [186], FePd [187], NiCo [188], Ni 5 Zn 21 [171] , and FeCoNi [189] have also been fabricated. The metal nanowires deposited by electrodeposition usually adopt polycrystalline structures but single crystal nanowires have also been obtained.…”

Section: Metals Within Paa Mtfs and Bcps Templatesmentioning

confidence: 99%

Self-assembled templates for the generation of arrays of 1-dimensional nanostructures: From molecules to devices

Farrell

Petkov²,

Morris

et al. 2010

Journal of Colloid and Interface Science

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Self-assembled nanoscale porous architectures, such as mesoporous silica films (MPS), block copolymer films (BCP) and porous anodic aluminas (PAAs), are ideal hosts for templating one dimension (1 D) nano-entities for a wide range of electronic, photonic, magnetic and environmental applications. All three templates offer dimensional scalability and tunability over a wide range, with critical pore sizes for each system well below the 20 nm threshold [1][2][3]. Recently, research has progressed towards controlling the pore direction, orientation and long range order of these nanostructures through so called directed self-assembly (DSA). Significantly, the introduction of a wide range of top-down chemically and physically pre-patterning substrates has facilitated the DSA of nanostructures into functional device arrays. The following review begins with an overview of the fundamental aspects of self-assembly and ordering processes during the formation of PAAs, BCPs and MPS films. Special attention is given to the different ways of directing self-assembly, concentrating on properties such as uni-directional alignment, precision placement and registry of the self-assembled structures to hierarchal or top down architectures. Finally, to distinguish this review from other articles we focus on research where nanostructures have been utilised in part to fabricate arrays of functioning devices below the sub 50 nm threshold, by subtractive transfer and additive methods. Where possible, we attempt to compare and contrast the different templating approaches and highlight the strengths and/or limitations that will be important for their potential integration into downstream processes. ACCEPTED MANUSCRIPT 3 SECTION 1.0: SELF ASSEMBLY AND NANO-ARCHITETCURESThe diversity of self-assembled nanostructures and more importantly, their precise orientation within a thin film (fixed to a substrate) ultimately determines their function and overall application. A large population of research reports to date have focused on identifying these orientations and related periodicities, using x-ray and microscopy tools, as well the development of methods for readily manipulating nanostructures, such as pre-patterning of silicon substrates for the alignment of block copolymers (BCPs) [4] and mesoporous thin films (MTFs) [5] and altering the growth direction of porous anodic alumina (PAA) templates [6]. In this section, a brief synopsis of the mechanisms behind the self-assembly/organisation of each system and highlight nanoscale architectures (and orientations), which are important from a device perspective. Templated mesoporous thin filmsOrdered mesoporous powders were first discovered by researchers at the Mobil Petrochemical Corporation in 1992 and shortly after, sol-gel derived mesoporous silica films were fabricated [1,7].The first series of ordered mesoporous films were reported by Yang et al. in 1996 [8], prepared using initial surfactant concentrations above their critical micelle concentration (CMC). However the films prepared fil...

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Section: Metals Within Paa Mtfs and Bcps Templatesmentioning

confidence: 99%

Self-assembled templates for the generation of arrays of 1-dimensional nanostructures: From molecules to devices

Farrell

Petkov²,

Morris

et al. 2010

Journal of Colloid and Interface Science

View full text Add to dashboard Cite

show abstract

“…In the last years, studies on ferromagnetic-nonmagnetic multilayer nanowire arrays and binary systems, including CoCu, FeAg, CoAg, CoPd, and CoPt, have been reported in the literature [4][5][6][7] due to their interesting magnetic and magnetotransport properties.…”

Section: Introductionmentioning

confidence: 99%

Tuning the magnetization reversal process of FeCoCu nanowire arrays by thermal annealing

Bran

Ivanov

Garcı́a

et al. 2013

Journal of Applied Physics

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Arrays of hexagonally ordered Fe 28 Co 67 Cu 5 nanowires with tailored diameter from 18 to 27 nm were prepared by electroplating into anodic alumina templates and annealed in the temperature range of 300-600 C, preserving but refining their bcc crystal structure. Despite the partial reduction of saturation magnetization and corresponding shape anisotropy after annealing at 500 C, larger coercivity, 0.36 T, and squareness ratio, M r /M s ¼ 0.98, were obtained. This unexpected behavior is interpreted through micromagnetic simulations where the magnetic hardening is associated with the transition from vortex to transverse domain-wall reversal modes connected with the reduction of saturation magnetization. Simulations also predict a significant coercivity increase with decreasing nanowires diameter which agrees with experimental data in the overlapping diameter range. V C 2013 AIP Publishing LLC. [http://dx

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“…Specially single domain ferromagnetic alloy nanoparticles have tremendous potentiality in the application of storage device [1]. Among ferromagnetic binary alloy nanoparticles, CoPt is being extensively investigated not only from a fundamental but also from a technological point of view due to their remarkable magnetocrystalline anisotropy, chemical stability, high Curie temperature and possible applications in magnetic recording media [2][3][4][5][6] and also their integration capability in functional micro or nanodevices (MEMS/NEMS) [7].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of CoxPt1−x alloy nanoparticles of different phase by micellar technique and their properties study

Mandal

Das

Mandal

2009

Journal of Colloid and Interface Science

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Magnetic and structural properties of electrodeposited CoPt and FePt nanowires in nanoporous alumina templates

Cited by 72 publications

References 29 publications

Self-assembled templates for the generation of arrays of 1-dimensional nanostructures: From molecules to devices

Self-assembled templates for the generation of arrays of 1-dimensional nanostructures: From molecules to devices

Tuning the magnetization reversal process of FeCoCu nanowire arrays by thermal annealing

Synthesis of CoxPt1−x alloy nanoparticles of different phase by micellar technique and their properties study

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