Simple electrodepositing of CoFe/Cu multilayers: Effect of ferromagnetic layer thicknesses

Tekgül, Atakan; Alper, Mürsel; Köçkar, Hakan

doi:10.1016/j.jmmm.2016.06.039

Cited by 30 publications

(8 citation statements)

References 33 publications

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“…The reference electrode (the third electrode) is sometimes implemented in the scheme to provide better control of potential near the cathode. [98,99] Electrodeposition of metallic NWs is usually carried out in a potentiostatic regime. The process of electrodeposition involves reduction of metallic ions (Me nþ Þ and can be generally described by the following chemical reactions [58] Me…”

Section: Template Synthesis Of Nws and Ntsmentioning

confidence: 99%

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1D Nanomaterials in Fe‐Group Metals Obtained by Synthesis in the Pores of Polymer Templates: Correlation of Structure, Magnetic, and Transport Properties

Panina

Zagorskiy

Shymskaya

et al. 2021

Physica Status Solidi (a)

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1D cylindrical magnetic nanostructures (FeNi, FeCo, FeCoP) of complex topology such as nanowires (NWs), nanotubes (NTs), multilayered nanowires, and core–shell structures are discussed from the perspective of engineering a wide variety of magnetic materials from hard to semihard to soft. Most of recent data are given for the materials synthesized in the pores of polymer ion‐track membranes, which makes it possible to tune systematically the geometrical parameters, morphology, and composition. The key properties including crystal and micromagnetic structure, magnetic anisotropy, and coercivity are analyzed. Co‐based NWs with uniform morphology demonstrate coercivity of more than 10 kOe due to the combination of crystalline and shape anisotropies. In the case of NTs, the demagnetizing effect is reduced owing to a helical arrangement of the magnetization, which leads to low values of coercivity and remanence magnetization. Varying the geometrical parameters of multilayered NWs, the alternating soft and semihard magnetic layers can be made within a single nanowire, which is important for spin‐valve magnetoresistance. Au‐coated ferromagnetic nanostructures are biocompatible and can be used to enhance optical absorption. Ni@Au NTs used as substrates for Raman spectroscopy demonstrate the enhancement factor of the order of 104. Some aspects related to applications of 1D magnets are briefly overviewed.

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Section: Template Synthesis Of Nws and Ntsmentioning

confidence: 99%

“…There are two techniques of the electrodeposition of layered NWs: single bath [76,98,99] and double bath [102] methods. In the single bath method, electrolyte in the galvanic cell contains ions of all the metals which will form NWs.…”

Section: Electrodeposition Of Layered Nwsmentioning

confidence: 99%

1D Nanomaterials in Fe‐Group Metals Obtained by Synthesis in the Pores of Polymer Templates: Correlation of Structure, Magnetic, and Transport Properties

Panina

Zagorskiy

Shymskaya

et al. 2021

Physica Status Solidi (a)

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“…In addition to the above-mentioned physical deposition methods, it was demonstrated by Alper et al [ 25 , 26 ] in 1993 that the cost-efficient and simple technique of electrodeposition can also be tailored to a level that enables the preparation of magnetic/non-magnetic multilayers exhibiting the GMR phenomenon. The study of GMR in electrodeposited multilayers has considerably expanded since that time as summarized in several reviews [ 27 , 28 , 29 , 30 , 31 , 32 , 33 ] and has remained an active area of research [ 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 ]. The electrodeposition method is accessible for the preparation of magnetic/non-magnetic multilayers in which the magnetic layers are composed of the FM elements Fe, Co and Ni and their mutual alloys, whereas the non-magnetic spacer layer is in most cases Cu.…”

Section: Introductionmentioning

confidence: 99%

Spacer Layer Thickness Dependence of the Giant Magnetoresistance in Electrodeposited Ni-Co/Cu Multilayers

et al. 2022

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Electrodeposited Ni65Co35/Cu multilayers were prepared with Cu spacer layer thicknesses between 0.5 nm and 7 nm. Their structure and magnetic and magnetoresistance properties were investigated. An important feature was that the Cu layers were deposited at the electrochemically optimized Cu deposition potential, ensuring a reliable control of the spacer layer thickness to reveal the true evolution of the giant magnetoresistance (GMR). X-ray diffraction indicated satellite reflections, demonstrating the highly coherent growth of these multilayer stacks. All of the multilayers exhibited a GMR effect, the magnitude of which did not show an oscillatory behavior with spacer layer thickness, just a steep rise of GMR around 1.5 nm and then, after 3 nm, it remained nearly constant, with a value around 4%. The high relative remanence of the magnetization hinted at the lack of an antiferromagnetic coupling between the magnetic layers, explaining the absence of oscillatory GMR. The occurrence of GMR can be attributed to the fact that, for spacer layer thicknesses above about 1.5 nm, the adjacent magnetic layers become uncoupled and their magnetization orientation is random, giving rise to a GMR effect. The coercive field and magnetoresistance peak field data also corroborate this picture: with increasing spacer layer thickness, both parameters progressively approached values characteristic of individual magnetic layers. At the end, a critical analysis of previously reported GMR data on electrodeposited Ni-Co/Cu multilayers is provided in view of the present results. A discussion of the layer formation processes in electrodeposited multilayers is also included, together with a comparison with physically deposited multilayers.

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“…Jogschies et al investigated thin NiFe 81/19 polyimide layers for magnetic field sensing [28]. Tekgül et al applied the CoFe/Cu magnetic multilayers on GMR sensors [29]. Melzer et al reported flexible magnetic field sensors relying on the Hall effect [30].…”

Section: Introductionmentioning

confidence: 99%

A Flexible Magnetic Field Sensor Based on AgNWs & MNs-PDMS

Zhang

Sun

et al. 2019

Nanoscale Res Lett

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This paper presents a new flexible magnetic field sensor based on Ag nanowires and magnetic nanoparticles doped in polydimethylsiloxane (AgNWs & MNs-PDMS) with sandwich structure. The MNs act as the sensitive unit for magnetic field sensing in this work. Besides, the conductive networks are made by AgNWs during deformation. Magnetostriction leads to the resistance change of the AgNWs & MNs-PDMS sensors. Furthermore, the MNs increase the conductive paths for electrons, leading to lower initial resistance and higher sensitivity of the resulting sensor during deformation. A point worth emphasizing is that the interaction of the AgNWs and MNs plays irreplaceable role in magnetic field sensing, so the resistance change during stretching and shrinking was investigated. The flexible magnetic field sensor based on the mass ratio of MNs and AgNWs is 1:5 showed the highest sensitivity of 24.14 Ω/T in magnetic field sensing experiment. Finally, the magnetostrictive and piezoresistive sensing model were established to explore the mechanism of the sensor.

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Simple electrodepositing of CoFe/Cu multilayers: Effect of ferromagnetic layer thicknesses

Cited by 30 publications

References 33 publications

1D Nanomaterials in Fe‐Group Metals Obtained by Synthesis in the Pores of Polymer Templates: Correlation of Structure, Magnetic, and Transport Properties

1D Nanomaterials in Fe‐Group Metals Obtained by Synthesis in the Pores of Polymer Templates: Correlation of Structure, Magnetic, and Transport Properties

Spacer Layer Thickness Dependence of the Giant Magnetoresistance in Electrodeposited Ni-Co/Cu Multilayers

A Flexible Magnetic Field Sensor Based on AgNWs & MNs-PDMS

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