Propagation of cylindrical magnetic domains in orthoferrites

Perneski, A. J.

doi:10.1109/tmag.1969.1066517

Cited by 87 publications

(3 citation statements)

References 2 publications

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“…Other geometries having alternating positive and negative curvatures can also be used to transport magnetized objects. The designs illustrated in Figure b–f are adapted from magnetic bubble technology …”

Section: Resultsmentioning

confidence: 99%

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Magnetophoretic Conductors and Diodes in a 3D Magnetic Field

Abedini-Nassab

Joh

Triggiano

et al. 2015

Adv Funct Materials

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We demonstrate magnetophoretic conductor tracks that can transport single magnetized beads and magnetically labeled single cells in a 3-dimensional time-varying magnetic field. The vertical field bias, in addition to the in-plane rotating field, has the advantage of reducing the attraction between particles, which inhibits the formation of particle clusters. However, the inclusion of a vertical field requires the re-design of magnetic track geometries which can transport magnetized objects across the substrate. Following insights from magnetic bubble technology, we found that successful magnetic conductor geometries defined in soft magnetic materials must be composed of alternating sections of positive and negative curvature. In addition to the previously studied magnetic tracks taken from the magnetic bubble literature, a drop-shape pattern was found to be even more adept at transporting small magnetic beads and single cells. Symmetric patterns are shown to achieve bi-directional conduction, whereas asymmetric patterns achieve unidirectional conduction. These designs represent the electrical circuit corollaries of the conductor and diode, respectively. Finally, we demonstrate biological applications in transporting single cells and in the size based separation of magnetic particles.

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Section: Resultsmentioning

confidence: 99%

“…Many of these ideas are borrowed from magnetic bubble technology, which was explored in the 1970s and 1980s to perform logic operations and store digital information . In this technology, a strong vertical field is used to create small domains of magnetization (i.e., magnetic bubbles) in iron garnet films.…”

Section: Introductionmentioning

confidence: 99%

Magnetophoretic Conductors and Diodes in a 3D Magnetic Field

Abedini-Nassab

Joh

Triggiano

et al. 2015

Adv Funct Materials

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show abstract

“…These arrays work well from quasistatic propagation rates up to circuit limits. The search for fine layout to produce faster storage systems has produced many patterns such as T-bar (Perneski 1969), Y-bar (Danylchuck 1971), chevron (Bobeck et al 1972), parallel bar (Della Torre and Kinser 1973), and X-bar (Parzefall et a1 1973).…”

Section: Introductionmentioning

confidence: 99%

The field of the propagating circuits of bubble devices

Wanas

1976

J. Phys. D: Appl. Phys.

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A method for calculating the perpendicular field of the Permalloy propagating overlay of bubble devices is presented. The Permalloy overlay is thought of as being built of a collection of basic building blocks. The field due to a convenient basic building block is obtained in a closed form. The resultant field due to the collection of the basic blocks which constitutes the overlay pattern is obtained by summing up the fields due to the individual basic blocks with their respective position and orientation.

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The Energy and General Translation Force of Cylindrical Magnetic Domains

Thiele¹,

Bobeck²,

Torre

et al. 1971

Bell System Technical Journal

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In this paper we compute the change in the energy of a uniformly magnetized uniaxial platelet produced by the introduction of a cylindrical domain. Differentiation of the energy expression yields the translational force produced by gradients in plate thickness, material composition, or temperature. The force expressions provide a means for estimating the effect of gradients in these parameters on the margins of domain devices. Equating the sum of the gradient produced forces to the drag force yields a general domain velocity expression. The various results are presented in both graphical and tabular form.

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Propagation of cylindrical magnetic domains in orthoferrites

Cited by 87 publications

References 2 publications

Magnetophoretic Conductors and Diodes in a 3D Magnetic Field

Magnetophoretic Conductors and Diodes in a 3D Magnetic Field

The field of the propagating circuits of bubble devices

The Energy and General Translation Force of Cylindrical Magnetic Domains

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