Magnetization switching of a magnetic wire with trilayer structure using giant magnetoresistance effect

Shigeto, K.; Okuno, T.; Shinjo, Teruya; Suzuki, Y.; Ono, Teruo

doi:10.1063/1.1323538

Cited by 20 publications

(12 citation statements)

References 30 publications

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“…The field associated with the nucleation of the reversed domain can be large, since it must overcome the shape anisotropy of the wire. This field decreases as the inverse of the wire width and can reach several hundred oersteds in submicron-wide permalloy or Co nanowires (Shigeto et al, 2000).…”

Section: Field-driven Domain-wall Motion In Magnetic Nanowiresmentioning

confidence: 99%

Current Induced Domain‐wall Motion in Magnetic Nanowires

Thomas¹,

Parkin²

2007

Handbook of Magnetism and Advanced Magnetic Materials

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Recent research on current‐induced domain‐wall motion in magnetic nanowires is reviewed. The first part of the article is devoted to theoretical models and micromagnetic simulations. We first describe the magnetic structure of head‐to‐head domain walls, and then discuss theories of their interaction with spin‐polarized current. The role of both adiabatic and nonadiabatic spin‐transfer torques is discussed in the framework of an analytical one‐dimensional model and micromagnetic simulations. The second part of the article reviews recent experimental studies. Both field‐driven and current‐driven excitation and manipulation of domain walls is discussed.

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Section: Field-driven Domain-wall Motion In Magnetic Nanowiresmentioning

confidence: 99%

Current Induced Domain‐wall Motion in Magnetic Nanowires

Thomas¹,

Parkin²

2007

Handbook of Magnetism and Advanced Magnetic Materials

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“…[31][32][33]35,36 However, when using ferromagnetic contacts these contact structures influence the reversal mechanism. 37 To definitely exclude a magnetic influence of the contacts on the individual ferromagnetic nanowires we use nonmagnetic gold contacts for our experiments which allow us to investigate the pure magnetization reversal behavior of individual Co nanowires.…”

Section: Introductionmentioning

confidence: 99%

Resistance behavior and magnetization reversal analysis of individualConanowires

Leven

Dumpich

2005

Phys. Rev. B

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Since the direct observation of magnetization reversal processes in nanostructured systems is hard to achieve, we use magnetoresistance measurements as an indirect sensing tool. To avoid dipolar interactions present in nanowire gratings individual Co nanowires are prepared by electron beam lithography on Si substrates. Using a special two step process nonmagnetic gold contacts are attached to the Co nanowires to exclude an influence of the contact structures on the magnetization reversal process. To support the magnetoresistance analysis also the structure and morphology as well as the magnetic properties of the Co nanowires have been characterized using various microscopy and measurement techniques. Depending on the direction of the applied field three different magnetoresistance measurements can be distinguished. Based on the anisotropic magnetoresistance effect the transversal and the polar magnetoresistance reflect a coherent rotation of the magnetization independent of the wire width. In contrast, the longitudinal magnetoresistance shows a wire widths dependence of the magnetization reversal processes. In small wires nucleation processes occur whereas in wide wires the formation of complex domain structures has been observed. Nanowires with a width in between these groups show "transition"-like reversal processes.

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“…Recently, several groups studied the width dependence of the magnetization reversal process in narrow ferromagnetic wires by measuring the MR, and reported that the coercive force and the switching field are proportional to the diamagnetic field along the wire axis [5][6][7]. Their works gave a perspective that the effect of the wire length is negligible to the MR owing to the smallness of the wire width compared to the length.…”

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confidence: 97%