Magnetization processes in electrodeposited NiFe/Cu multilayered nanowires

Krimpalis, S.; Dragos, Oana-Georgiana; Moga, A.; Lupu, N.; Chiriac, H.

doi:10.1557/jmr.2011.62

Cited by 27 publications

(16 citation statements)

References 41 publications

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“…By the way, in case of a thin film containing an array of nanowires with a large aspect more than ca. 100 [24][25][26][27], the array will be easily magnetized even in the perpendicular direction to the film plane due to decreasing f d . On the contrary, when the magnetic field is applied to in-plane direction to the film plane, f d will be almost zero and H eff will be equal to H a .…”

Section: Magnetic Properties Of Electrodeposited Ni-cr and Co-cr Alloysmentioning

confidence: 99%

Soft magnetic properties of Ni–Cr and Co–Cr alloy thin films electrodeposited from aqueous solutions containing trivalent chromium ions and glycine

2012

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Abstract.Ferromagnetic Ni-Cr and Co-Cr alloy thin films were electrodeposited from aqueous solution containing trivalent chromium (Cr 3+ ) ions and glycine. According to the Tafel slopes obtained from the cathode polarization curves for Ni-Cr and Co-Cr alloy deposition, it was estimated that Cr 3+ ions inhibited Ni 2+ and Co 2+ ions from electrodepositing. Ni and Co preferentially electrodeposited rather than Cr and the electrodeposition process of Ni-Cr and Co-Cr was categorized to "normal co-deposition type." At the cathode potential of -1.8 V vs.Ag/AgCl/KCl sat., Ni-9.5%Cr and Co-8.4%Cr alloy deposits were obtained. X-ray diffraction patterns of the electrodeposits revealed that pure Ni and pure Co consist of large crystal grains, while Ni-9.5%Cr and Co-8.4%Cr alloys were composed of a solid solution phase with fine crystal grains. Magnetization of Ni-9.5%Cr and Co-8.4%Cr alloy thin films with fine crystalline phase reached to saturation at ca. 2.5 kOe in perpendicular direction to the film plane while pure Ni and pure Co thin film with large crystal grains were hardly magnetized in the perpendicular direction. Soft magnetic properties were improved with increasing Cr content in the deposits.

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Section: Magnetic Properties Of Electrodeposited Ni-cr and Co-cr Alloysmentioning

confidence: 99%

Soft magnetic properties of Ni–Cr and Co–Cr alloy thin films electrodeposited from aqueous solutions containing trivalent chromium ions and glycine

2012

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“…The combination of multilayers of different materials, both magnetic and non-magnetic, has been spreading much interest due to the magnetic capability to control the interactions and the effect of magnetic anisotropy obtained by only varying the metal type and segment lengths [ 15 , 16 , 17 ]. In this sense, we can highlight some studies on multi-segmented NWs that employed Ni/Au [ 18 , 19 ], Ni/Cu [ 13 , 20 , 21 , 22 , 23 , 24 , 25 , 26 ], CoNi/Cu [ 27 ], NiFe/Cu [ 28 ], FeGa/Cu [ 16 , 17 ], Co/Cu [ 29 , 30 , 31 , 32 ], and Co/Au [ 33 ]. Because of particular advantages, such as their high saturation magnetization [ 34 ] and the large possibility of modulation of their magnetic properties [ 35 ], systems with FeCo alloys (i.e., CoFeB/Cu [ 36 ], CoFe/Au [ 35 ], CoFe/Cu [ 37 , 38 , 39 , 40 , 41 ]) have been well studied.…”

Section: Introductionmentioning

confidence: 99%

The Role of Cu Length on the Magnetic Behaviour of Fe/Cu Multi-Segmented Nanowires

et al. 2018

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A set of multi-segmented Fe/Cu nanowires were synthesized by a two-step anodization process of aluminum substrates and a pulsed electrodeposition technique using a single bath. While both Fe segment length and diameter were kept constant to (30 ± 7) and (45 ± 5) nm, respectively, Cu length was varied between (15 ± 5) and (120 ± 10) nm. The influence of the non-magnetic layer thickness variation on the nanowire magnetic properties was investigated through first-order reversal curve (FORC) measurements and micromagnetic simulations. Our analysis confirmed that, in the multi-segmented Fe/Cu nanowires with shorter Cu segments, the dipolar coupling between Fe segments controls the nanowire magnetic behavior, and its performance is like that of a homogenous Fe nanowire array of similar dimensions. On the other hand, multi-segmented Fe/Cu nanowires with larger Cu segments act like a collection of non-interacting magnetic entities (along the nanowire axis), and their global behavior is mainly controlled by the neighbor-to-neighbor nanodisc dipolar interactions.

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“…Magnetic multilayered nanowires (MNWs) are one group of the nanowire family, which own giant magnetoresistance (GMR) effect and are mainly grown by using template method with electrodeposition technique [1][2][3] . Their magnetotransport behaviors are usually utilized for possible diverse nano-spintronic applications including magnetic memory, magnetic field sensor, logic devices, signal processing device, current driven microwave oscillators [4][5] . The accurate characterization of individual NWs rather than groups is thus essential and critical for the functionality and reliability of the NW-component magnetoelectronics and magnetosensors.…”

Section: Introductionmentioning

confidence: 99%

“…The accurate characterization of individual NWs rather than groups is thus essential and critical for the functionality and reliability of the NW-component magnetoelectronics and magnetosensors. However, the most magnetoresistance (MR) measurements are performed on the array of multilayered nanowires which are still embedded into template channels due to technology limitations [6][7] , by which the MR signal of a single nanowire is then estimated by averaging. It is therefore not accurate and includes uncertain contact resistance of electrodes.…”

Section: Introductionmentioning

confidence: 99%

“…The trend of miniaturization in microelectronics makes nanowires (NWs) more and more prominent. − Magnetic multilayered nanowires (MNWs), which are mainly grown by the template method with an electrodeposition technique, , are one group of the nanowire family and own giant magnetoresistance (GMR) effect . Their magnetotransport behaviors are usually utilized for possible diverse nanospintronic applications including magnetic memory, magnetic field sensors, logic devices, signal-processing devices, and current-driven microwave oscillators. , The accurate characterization of individual NWs rather than groups is thus essential and critical to improve the functionality and reliability of the NW-component magnetoelectronics and magnetosensors. However, most magnetoresistance (MR) measurements are performed on the array of multilayered nanowires which are still embedded into template tunnels because of technology limitations. , The MR signal of a single nanowire is then estimated by averaging.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Magnetotransport Mechanism of Individual Nanostructures via Direct Magnetoresistance Measurement in situ SEM

Zhang

Peng

Hai

et al. 2020

ACS Appl. Mater. Interfaces

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The accurate magnetoresistance measurement of individual nanostructures is essential and significant for not only enriching the fundamental knowledge of magneto-transport mechanism but also facilitating the designs of desired magnetic nanostructures for diverse technological applications. Herein, we report a deep investigation on the magneto-transport mechanism of single CoCu/Cu multilayered nanowire via direct magnetoresistance measurement by using our invented magnetotransport instrument in-situ scanning electron microscopy (SEM). Off-axis electron holography experiments combined with micromagnetic simulation prove that the CoCu layers in CoCu/Cu multilayered nanowires are formed a multi-domain structure, in which the alignment of magnetic moments is mainly determined by shape anisotropy. The MR of the single CoCu/Cu multilayered nanowire is measured to be only 1.14% when the varied external field is applied along nanowire length axis, which matches with the theoretical prediction of Granular Films model. Density functional theory (DFT) calculations further disclose that spin-dependent scattering at the interface between magnetic and nonmagnetic layers is responsible for the intrinsic magneto-transport mechanism.

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Magnetization processes in electrodeposited NiFe/Cu multilayered nanowires

Abstract: Abstract

Cited by 27 publications

References 41 publications

Soft magnetic properties of Ni–Cr and Co–Cr alloy thin films electrodeposited from aqueous solutions containing trivalent chromium ions and glycine

Soft magnetic properties of Ni–Cr and Co–Cr alloy thin films electrodeposited from aqueous solutions containing trivalent chromium ions and glycine

The Role of Cu Length on the Magnetic Behaviour of Fe/Cu Multi-Segmented Nanowires

Magnetotransport Mechanism of Individual Nanostructures via Direct Magnetoresistance Measurement in situ SEM

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