Magnetotransport and domain structures in nanoscale NiFe/Cu/Co spin valve

Kong, Linshu; Pan, Quanjun; Cui, Bo; Li, M.; Chou, Stephen Y.

doi:10.1063/1.369872

Cited by 21 publications

(5 citation statements)

References 5 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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“…2(b), it brings insights on the orientations between the magnetizations of the ferromagnetic layers at different magnetic field values, as well as on the magnetization reversal process previously discussed. The largest resistance values are found when an antiparallel alignment between the magnetizations of the soft and hard ferromagnetic layers is established, while the smaller ones occur in the case of the parallel alignment [30][31][32][33] . Thus, when the field is swept from the maximum negative to the positive value, the abrupt rise of the resistance occurs at the switching field of the soft NiFe layer, where the magnetic configuration passes from a parallel to an antiparallel alignment between the ferromagnetic layers.…”

Section: Resultsmentioning

confidence: 98%

On the nature of the interlayer magnetic interactions in biphase ferromagnetic films

Silva

Gamino

Oliveira

et al. 2023

Preprint

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We report on the nature of the interlayer magnetic interactions in NiFe/Cu/Co films.By probing the quasi-static and dynamic magnetic properties of biphase ferromagnetic films, with soft and hard ferromagnetic phases intermediated by a non-magnetic layer, we address aspects of the coupling between magnetic layers. Our results demonstrate the nature of the interlayer magnetic coupling in biphase films. We also disclose the asymmetric magnetoimpedance effect as a fingerprint of the nature of the magnetic interlayer interactions playing key role in the magnetization dynamics of the system. We revisit in literature data and ideas on the asymmetric magnetoimpedance and the nature of the magnetic interactions in biphase ferromagnetic systems. Then, we compare our findings with results for biphase ribbons and microwires. Our observations raise the fundamental similarities and differences in the magnetoimpedance response of these structures, hence providing a single framework to interpret the phenomenon of asymmetric magnetoimpedance.

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“…2b, it brings insights on the orientations between the magnetizations of the ferromagnetic layers at different magnetic field values, as well as on the magnetization reversal process previously discussed. The largest resistance values are found when an antiparallel alignment between the magnetizations of the soft and hard ferromagnetic layers is established, while the smaller ones occur in the case of the parallel alignment 17,[42][43][44] . Thus, when the field is swept from the maximum negative to the positive values, the abrupt rise of the resistance occurs at the switching field of the soft NiFe layer, where the magnetic configuration passes from a parallel to an antiparallel alignment between the ferromagnetic layers.…”

Section: Asymmetric Magnetoimpedance Effectmentioning

confidence: 98%

On the nature of the interlayer magnetic interactions in biphase ferromagnetic films

Silva

Gamino

Oliveira

et al. 2023

Sci Rep

View full text Add to dashboard Cite

We report on the nature of the interlayer magnetic interactions in NiFe/Cu/Co films. By probing the quasi-static and dynamic magnetic properties of biphase ferromagnetic films, with soft and hard ferromagnetic phases intermediated by a non-magnetic layer, we address aspects of the coupling between magnetic layers. Our results demonstrate the nature of the interlayer magnetic coupling in biphase films. We also disclose the asymmetric magnetoimpedance effect as a fingerprint of the nature of the magnetic interlayer interactions playing key role in the magnetization dynamics of the system. We revisit in literature data and ideas on the asymmetric magnetoimpedance and the nature of the magnetic interactions in biphase ferromagnetic systems. Then, we compare our findings with results for biphase ribbons and microwires. Our observations raise the fundamental similarities and differences in the asymmetric magnetoimpedance of these structures.

show abstract

Magnetotransport and domain structures in nanoscale NiFe/Cu/Co spin valve

Cited by 21 publications

References 5 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

On the nature of the interlayer magnetic interactions in biphase ferromagnetic films

On the nature of the interlayer magnetic interactions in biphase ferromagnetic films

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