Engineering of domain wall propagation in magnetic microwires with graded magnetic anisotropy

Corte-León, Paula; Blanco, J.M.; Chizhik, A.; Ipatov, M.; González, J.; Fert, A.; Alonso, Asier; Zhukov, А.

doi:10.1016/j.apmt.2021.101263

Cited by 18 publications

(29 citation statements)

References 62 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As recently shown, the stress-annealing-induced magnetic anisotropy of microwires depends on T ann , t ann , and σ [ 53 , 57 , 70 ]. Accordingly, stress-annealing of Fe-rich microwires in the T ann gradient was employed for realization of controllable spatial distribution of the magnetic anisotropy, that is, for development of graded magnetic anisotropy [ 53 , 57 ].…”

Section: Resultsmentioning

confidence: 99%

“…In this case, the sample length was 50 mm, and each sample was placed inside the solenoid which was 120 mm long. The variation of the hysteresis loops along the sample length was evaluated using a short (2 mm long), movable pick-up coil, as also recently reported for Fe-rich microwires [ 57 ]. In both cases, it is essentially relevant that the pick-up coil lengths (2 mm and 20 mm, respectively) are much shorter than the length of the magnetizing coil (120 mm).…”

Section: Methodsmentioning

confidence: 99%

“…Both samples were annealed in a standard Thermolyne furnace. The annealing at variable temperature was performed in a similar way as for Fe-rich microwires [ 57 ]: a 30 cm long microwire was annealed in a conventional furnace under tensile stress, σ, created by a mechanical load, P , attached to one end of the microwire (see Figure 2 ). Such σ —magnitude was obtained considering the composite structure of microwires consisting of a metallic nucleus and glass coating with different Young moduli ( E 2 —for the metal and E 1 —for the glass coating), as previously described elsewhere [ 49 , 50 , 51 , 52 , 53 , 58 ]:

being K = E 2 /E 1 and S m and S gl being the metallic nucleus and glass coating cross-sections, respectively.…”

Section: Methodsmentioning

confidence: 99%

“…Previously, graded magnetic anisotropy was obtained by a rather sophisticated method involving modification of the chemical composition during the sample preparation [ 54 , 55 ]. Magnetic materials with graded magnetic anisotropy presenting controllable spatial distribution of the magnetic anisotropy can show unusual magnetic properties: it was predicted [ 56 ] and recently experimentally shown [ 53 , 57 ] that materials with graded magnetic anisotropy can present controllable nucleation or pinning of domain walls.…”

Section: Introductionmentioning

confidence: 99%

“…Accordingly, the parameter that can be modified during stress-annealing in the easiest way is T ann . Therefore, stress-annealing in a T ann gradient was proposed for the development of Fe-rich microwires with graded magnetic anisotropy [ 53 , 57 ].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Development of Co-Rich Microwires with Graded Magnetic Anisotropy

Zhukova

Corte-León

Blanco

et al. 2021

Sensors

View full text Add to dashboard Cite

In this paper, a gradual change in the hysteresis loop of Co-rich glass-coated microwire stress-annealed at variable temperature is observed. Such microwires annealed with a temperature gradient also present a variable squareness ratio and magnetic anisotropy field along the microwire’s length. The obtained graded anisotropy has been attributed to a gradual modification of the domain structure along the microwire originated by a counterbalance between shape, magnetoelastic, and induced magnetic anisotropies. Accordingly, we propose a rather simple route to design graded magnetic anisotropy in a magnetic microwire.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

being K = E 2 /E 1 and S m and S gl being the metallic nucleus and glass coating cross-sections, respectively.…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Development of Co-Rich Microwires with Graded Magnetic Anisotropy

Zhukova

Corte-León

Blanco

et al. 2021

Sensors

View full text Add to dashboard Cite

show abstract

Direct Writing of Shape‐Gradient Magnetic Alloy Microwire Arrays with Meniscus‐Confined Electrodeposition Process

Nie

Lei

Zhang

et al. 2022

Adv Materials Technologies

View full text Add to dashboard Cite

recording due to their high aspect ratio, high coercivity, and high storage density. [6] Modulating the magnitude of the coercivity and the saturation magnetization by combining magnetic materials and pure metals was initially developed in 1978 to produce binary and ternary alloys. [7] Since then, binary alloys have attracted widespread attention due to their potential applications in magnetoresistive and thermoelectric devices. [8] In recent years, the influence of morphology [9] and composition [10] inhomogeneity on magnetic alloy micro/nanowires has been studied extensively. But the preparation of ordered gradient micro/nanowires with controllable diameters and compositions is still a major problem.The gradient magnetic anisotropy is so far mainly achieved by changing the material shape of a single metal micro/ nanowire, [11] or by changing the material composition of alloy micro/nanowires. [12] The anodic aluminum oxide (AAO)-templated electrodeposition method [9] is the most commonly used method for mass production of gradient micro/nanowires. Prida et al. [13] employed a SiO 2 -coated hard AAO membrane as the template for electrochemical growth of multisegmented Co-Ni nanowire arrays by alternately varying between two different deposition potentials. Magnetic anisotropy is realized with the prepared wire arrays due to the alternating composition and crystalline structure of the individual segment. To realize shape gradient, Arzuza et al. [14] combined the three-step anodization with an intermediate chemical etching step to modulate the wire diameter.Gradient magnetic micro/nanowire arrays have attracted widespread attention due to their interesting properties. However, fabricating such an ordered array of gradient micro/nanowires with controllable diameters and compositions is still a great challenge to most of the current methods. Here, meniscus-confined electrodeposition (MCED) technique is adopted for the rapid prototyping of the shape-gradient magnetic Cu/Co-alloy microwire arrays by adjusting the printing speed continuously, which provides a novel idea for the preparation and performance research of shape-gradient magnetic alloy microwire arrays with well-defined structures. It is found that the key to fabricating controllable gradient alloy micro/nano structures by increasing the printing speed is to continuously stretch the meniscus within the stable range of the meniscus. In the range of incremental speed in this study, the shape-gradient magnetic alloy wires with stable and uniform compositions and dense internal structures can be successfully prepared, and the gradient ratio can be adjusted from 0 to about 0.025. Compared with the uniform-diameter array, the shape-gradient magnetic alloy array shows an improvement in remanence and coercive force.The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/admt.202200024.

show abstract