Multilayer spin-valve CoFeP/Cu nanowires with giant magnetoresistance

Шарко, С. А.; Серокурова, А. И.; Zubar, T.I.; Trukhanov, S. V.; Тишкевич, Д.И.; Samokhvalov, A. A.; Kozlovskiy, Artem L.; Zdorovets, Maxim V.; Panina, L.V.; Fedosyuk, V. M.; Труханов, А.В.

doi:10.1016/j.jallcom.2020.156474

Cited by 25 publications

(16 citation statements)

References 57 publications

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“…[30] Then, it is possible to obtain alternating layers with soft and semihard magnetic properties, which is important for spin-valve structures. [31,32] As for the giant magnetoresistive effect (GMR), layered NWs have a number of advantages over multilayered films. First, in this configuration, the direction of the current is perpendicular to the surface (the so-called CPP geometry [33] ).…”

Section: Introductionmentioning

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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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: Introductionmentioning

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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“…Among the solid template-based methods, the template-assisted electrochemical deposition of metals or their alloys is one of the most efficient and versatile techniques, which is widely used for the synthesis of nanowires inside the pores of polymer, Si/SiO 2 or porous anodic alumina matrices. [25][26][27][28][29][30][31] In particular, in works [18][19][20] an approach is proposed for Ni nanostructures formation which could be conducted without matrices with little time at a relatively low temperature (up to 150 C) for further its industrial mass production. The synthesis of polycrystalline Ni nanostructures with different controllable morphologies (including nanowires) was accomplished by a facile wet-chemical reduction method, templates etc.…”

Section: Introductionmentioning

confidence: 99%

The influence of the synthesis conditions on the magnetic behaviour of the densely packed arrays of Ni nanowires in porous anodic alumina membranes

et al. 2021

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“…Ni-rich permalloy has high permeability, low coercivity, and small magnetic anisotropy [ 11 , 17 , 19 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 ]. Electrodeposited coatings are promising due to the high economic viability of the electrodeposition process [ 29 , 30 , 31 , 32 ]. The ability to deposit a protection coating on the substrates with a complex shape should also be noted among the main advantages of electrodeposition.…”

Section: Introductionmentioning

confidence: 99%

Efficiency of Magnetostatic Protection Using Nanostructured Permalloy Shielding Coatings Depending on Their Microstructure

et al. 2021

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The effect of microstructure on the efficiency of shielding or shunting of the magnetic flux by permalloy shields was investigated in the present work. For this purpose, the FeNi shielding coatings with different grain structures were obtained using stationary and pulsed electrodeposition. The coatings’ composition, crystal structure, surface microstructure, magnetic domain structure, and shielding efficiency were studied. It has been shown that coatings with 0.2–0.6 µm grains have a disordered domain structure. Consequently, a higher value of the shielding efficiency was achieved, but the working range was too limited. The reason for this is probably the hindered movement of the domain boundaries. Samples with nanosized grains have an ordered two-domain magnetic structure with a permissible partial transition to a superparamagnetic state in regions with a grain size of less than 100 nm. The ordered magnetic structure, the small size of the domain, and the coexistence of ferromagnetic and superparamagnetic regions, although they reduce the maximum value of the shielding efficiency, significantly expand the working range in the nanostructured permalloy shielding coatings. As a result, a dependence between the grain and domain structure and the efficiency of magnetostatic shielding was found.

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Multilayer spin-valve CoFeP/Cu nanowires with giant magnetoresistance

Cited by 25 publications

References 57 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

The influence of the synthesis conditions on the magnetic behaviour of the densely packed arrays of Ni nanowires in porous anodic alumina membranes

Efficiency of Magnetostatic Protection Using Nanostructured Permalloy Shielding Coatings Depending on Their Microstructure

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