Scaling of the coercivity with the geometrical parameters in epitaxial Fe antidot arrays

Paz, Elvira; Cebollada, F.; Palomares, F. J.; González, J.M.; Im, Maesoon; Fischer, Peter

doi:10.1063/1.3702584

Cited by 14 publications

(8 citation statements)

References 19 publications

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“…5 for Fe, Co, and Py antidot films. Remarkably, this finding is in agreement with previously published results for antidots arranged in square lattices prepared by conventional lithographic techniques [ 38 – 39 ] and underlines the suitability of the self-assembly method. Further, geometry dependent coercive fields have also been discussed in the work of Smyth et al [ 40 ].…”

Section: Resultssupporting

confidence: 92%

Magnetic switching of nanoscale antidot lattices

Wiedwald¹,

Gräfe²,

Lebecki³

et al. 2016

Beilstein J. Nanotechnol.

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SummaryWe investigate the rich magnetic switching properties of nanoscale antidot lattices in the 200 nm regime. In-plane magnetized Fe, Co, and Permalloy (Py) as well as out-of-plane magnetized GdFe antidot films are prepared by a modified nanosphere lithography allowing for non-close packed voids in a magnetic film. We present a magnetometry protocol based on magneto-optical Kerr microscopy elucidating the switching modes using first-order reversal curves. The combination of various magnetometry and magnetic microscopy techniques as well as micromagnetic simulations delivers a thorough understanding of the switching modes. While part of the investigations has been published before, we summarize these results and add significant new insights in the magnetism of exchange-coupled antidot lattices.

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Section: Resultssupporting

confidence: 92%

Magnetic switching of nanoscale antidot lattices

Wiedwald¹,

Gräfe²,

Lebecki³

et al. 2016

Beilstein J. Nanotechnol.

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“…The presence of the nonmagnetic holes induces novel magnetic domain configurations and domain wall pinning, which affect static and dynamic properties of the system 1 . In particular, the magnetization reversal, the coercive field, and the effective magnetic anisotropy depend on the array geometry 2–6 , the period 7 , the antidot size 3,8 and shape 9,10 , as well as the order parameter 8 .…”

Section: Introductionmentioning

confidence: 99%

Magnetic reversal in perpendicularly magnetized antidot arrays with intrinsic and extrinsic defects

Krupiński

Sobieszczyk

Zieliński

et al. 2019

Sci Rep

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Defects can significantly affect performance of nanopatterned magnetic devices, therefore their influence on the material properties has to be understood well before the material is used in technological applications. However, this is experimentally challenging due to the inability of the control of defect characteristics in a reproducible manner. Here, we construct a micromagnetic model, which accounts for intrinsic and extrinsic defects associated with the polycrystalline nature of the material and with corrugated edges of nanostructures. The predictions of the model are corroborated by the measurements obtained for highly ordered arrays of circular Co/Pd antidots with perpendicular magnetic anisotropy. We found that magnetic properties, magnetic reversal and the evolution of the domain pattern are strongly determined by density of defects, heterogeneity of nanostructures, and edge corrugations. In particular, an increase in the Néel domain walls, as compared to Bloch walls, was observed with a increase of the antidot diameters, suggesting that a neck between two antidots can behave like a nanowire with a width determined by the array period and antidot size. Furthermore, the presence of edge corrugations can lead to the formation of a network of magnetic bubbles, which are unstable in non-patterned flat films.

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“…Recently, there has been growing interest in the fabrication, characterization, and modeling of patterned magnetic thin films due to their potential applications in the field of magnetic storage, sensors, radio frequency components, information processing, and magnonic crystals [1][2][3][4][5][6][7]. This specific interest is primarily due to the possibility of controlling the magnetic properties by introducing in ferromagnetic material artificial defects such as antidots or nonmagnetic inclusions arranged in ordered or disordered arrays [8][9][10][11][12][13]. In particular, the magnetic reversal mechanism in such systems can be easily tailored by shape [14,15], size [16,17] and distance between the nanostructures [9,18], as well as by the degree of order [17] and the symmetry of the array [19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Magnetic transition from dot to antidot regime in large area Co/Pd nanopatterned arrays with perpendicular magnetization

Krupiński¹,

Mitin²,

Zarzycki³

et al. 2017

Nanotechnology

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We have studied the transition between two different magnetization reversal mechanisms for thin Co/Pd multilayers with perpendicular magnetic anisotropy, appearing in magnetic dot and antidot arrays, which were prepared by nanosphere lithography. Various ordered arrays of nanostuctures, both magnetic dots and antidots, were created by varying size and distance between the nanospheres employing RF-plasma etching. We have shown that the coercivity values reach a maximum for the array of antidots with a separation length close to the domain wall width. In this case, each area between three adjacent holes corresponds to a single domain configuration, which can be switched individually. On the contrary, small hole sizes and large volume of material between them results in domain wall propagation throughout the system accompanied by strong domain wall pinning at the holes. We have also shown the impact of edge effects on the magnetic anisotropy energy.

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Scaling of the coercivity with the geometrical parameters in epitaxial Fe antidot arrays

Cited by 14 publications

References 19 publications

Magnetic switching of nanoscale antidot lattices

Magnetic switching of nanoscale antidot lattices

Magnetic reversal in perpendicularly magnetized antidot arrays with intrinsic and extrinsic defects

Magnetic transition from dot to antidot regime in large area Co/Pd nanopatterned arrays with perpendicular magnetization

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