Synthesis and properties of the arrays of magnetic nanowires of Co and CoFe

Khan, H.R.; Petrikowski, K.

doi:10.1016/s0928-4931(01)00414-3

Cited by 54 publications

(32 citation statements)

References 10 publications

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“…So far, limited studies have been done to examine the influence of the magnetic field applied during cobalt deposition into Al 2 O 3 pores on the magnetic properties of the cobalt nanowires, and previous studies had not provided clear results [25][26][27].…”

Section: Introductionmentioning

confidence: 99%

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Structure and magnetic properties of Co nanowires electrodeposited into the pores of anodic alumina membranes

Dobosz

Gumowska

Czapkiewicz

2014

J Solid State Electrochem

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Cobalt nanowires were obtained in the process of electrodeposition into pores of an alumina membrane. Structural research (XRD, TEM) of Co revealed the facecentered cubic structure. However, the existence of the hexagonal structure cannot be excluded due to strong texture. The influences of an external magnetic field and Al 2 O 3 membrane geometry on magnetic properties of obtained wires were examined. It was found that cobalt nanowires exhibit pronounced shape anisotropy in a direction parallel to the wire axis. The highest influence on the magnetic properties is ascribed to the nanowires geometry i.e., height, diameter, and distances between single wires. Application of an external magnetic field in a perpendicular direction to the sample surface during cobalt electrodeposition increases magnetic anisotropy with a privileged direction along the wire axis. Application of the magnetic field in a parallel direction to the sample surface changes the direction of magnetization.

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Section: Introductionmentioning

confidence: 99%

“…The fluid flow inside pores under an external magnetic field has not a stationary character. Such conditions can favor additional perturbations which can change origin morphology of the deposit [25,26].…”

Section: Introductionmentioning

confidence: 99%

Structure and magnetic properties of Co nanowires electrodeposited into the pores of anodic alumina membranes

Dobosz

Gumowska

Czapkiewicz

2014

J Solid State Electrochem

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“…The influence of the magnetic field on the electrochemical processes has been observed during the deposition of such metals as Co, Fe, Ni, and their alloys on flat electrode [10][11][12][13][14][15][16][17][18][19][20]. Relatively few studies have been carried out to investigate the influence of the magnetic field on the magnetic properties during the deposition of a ferromagnetic metal on the porous membrane surface [21,22].…”

Section: Introductionmentioning

confidence: 99%

“…The fluid motion inside pores induced by the action of the applied magnetic field may not be stationary. Such conditions may give rise to the forming of additional turbulences and forces, totally changing the deposit morphology [21,22].…”

Section: Introductionmentioning

confidence: 99%

Magnetic Properties of Co-Fe Nanowires Electrodeposited in Pores of Alumina Membrane

Dobosz¹,

Gumowska²,

Czapkiewicz³

2013

Archives of Metallurgy and Materials

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The nanowires of Co 66 -Fe 34 alloy were obtained in the process of the electrodeposition in the pores of alumina membrane. With the use of the X-ray diffraction analysis the structure of cobalt-iron alloy wires was determined. The wires have the regular Body Centred Cubic structure (BCC). The influence of membrane parameters, an external magnetic field, and the annealing temperature on the magnetic properties of alloy wires was investigated. The obtained nanowires show a high shape anisotropy in the direction perpendicular to the membrane surface of anodic alumina. It was found that the highest influence on the magnetic properties of the wires has their geometry (height, diameter, and the distance between them). The use of an external magnetic field directed perpendicular to the sample surface during the electrodeposition process and additional thermal treatment (annealing) causes a slight increase of the coercive field, remanence, and volume energy density.Keywords: Anodic alumina membrane, hysteresis loop, cobalt-iron alloy, nanowires Nanodruty stopu Co 66 Fe 34 uzyskano w procesie elektroosadzania w porach membrany tlenku glinu. Przy pomocy dyfrakcyjnej analizy rentgenowskiej określono strukturę drutów stopu kobalt -żelazo. Druty wykazują strukturę regularną przestrzennie centrowaną (RPC) (ang. BCC). Zbadano wpływ parametrów membrany, zewnętrznego pola magnetycznego oraz temperatury wyżarzania na własności magnetyczne drutów stopowych. Uzyskane nanodruty wykazują wysoką anizotropię kształtu w kierunku prostopadłym do powierzchni membrany anodowego tlenku glinu. Stwierdzono, że największy wpływ na własno-ści magnetyczne ma geometria drutów (wysokość, średnica oraz odległości między nimi). Zastosowanie zewnętrznego pola magnetycznego w kierunku prostopadłym do powierzchni próbki podczas procesu elektroosadzania oraz dodatkowej obróbki termicznej (wyżarzania) powoduje niewielki wzrost pola koercji, remanencji oraz gęstości objętościowej energii.

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“…The concentration dependence of the coercivity force along the NW axis appears to be related to the crystalline structure of the NWs and the coercivity reaches a maximum in the range in which the NWs crystallize in the body-centered-cubic structure. Khan et al designed an experiment to fabricate the arrays of Co and Co 90 Fe 10 NWs (of diameters 18 and 78 nm) by electrochemical method (Khan & Petrikowski, 2002). They had investigated the structural and magnetic properties of the isolated, electrodeposited Co and Co Fe NWs of 18 and 78 nm diameters.…”

Section: Co-fementioning

confidence: 99%