IP Library › Granted Patent US 10,614,902
Granted Patent B1
US 10,614,902 · App. 16/151,696 · Granted Apr 7, 2020

Tubular nanosized magnetic wires with 360° magnetic domain walls

Inventors: Benjamin Zingsem (Mönchengladbach, DE); Michael Farle (Mülheim a. d. Ruhr, DE); Thomas Feggeler (Essen, DE); Irene Iglesias (Duisburg, DE)
Assignee: Universität Duisburg-Essen
G11C19/0808G11C11/14G11C11/1673G11C11/1675
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Quick Facts
Patent No.
US 10,614,902
App. No.
16/151,696
Granted
Apr 7, 2020
Kind
B1
Abstract

The present invention is directed towards a tubular nanosized magnetic wire, wherein the nanosized magnetic wire comprises: a tubular magnetic shell surrounding a longitudinal axis of the wire, at least one region of the tubular magnetic shell is capable of providing a 360° magnetic domain wall, wherein the 360° magnetic domain wall is self-stabilizing and has a magnetization going from a parallel alignment to a perpendicular alignment and to a parallel alignment with regards to the wire axis. The present invention also provides a practical method capable of making a tubular nanosized magnetic wire with a self-stabilizing, 360° magnetic domain wall. The present invention also relates to the use of the tubular nanosized magnetic wire in a racetrack memory device.

Claims (12)

1. A tubular nanosized magnetic wire, wherein the nanosized magnetic wire comprises:

a tubular magnetic shell surrounding a longitudinal axis of the wire, wherein

at least one region of the tubular magnetic shell is capable of providing a 360° magnetic domain wall, wherein the 360° magnetic domain wall is self-stabilizing and has a magnetization going from a parallel alignment to a perpendicular alignment and to a parallel alignment with regards to the wire axis.

2. The tubular nanosized magnetic wire according to claim 1 , wherein

the tubular nanosized magnetic wire is a coaxial wire wherein a solid non-magnetic center core is surrounded by the tubular magnetic shell.

3. The tubular nanosized magnetic wire according to claim 1 , wherein

the shape of the cross section of the tubular nanosized magnetic wire is circular or elliptical.

4. The tubular nanosized magnetic wire according to claim 1 , wherein

the self-stabilizing, 360° magnetic domain wall is a Nèel-type magnetic domain wall.

5. The tubular nanosized magnetic wire according to claim 1 , wherein

the self-stabilizing, 360° magnetic domain wall is a Bloch-type magnetic domain wall.

6. The use of the tubular nanosized magnetic wire according to claim 1 in a racetrack memory device.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Nov 15, 2018
From: FARLE, MICHAEL; FEGGELER, THOMAS; IGLESIAS, IRENE; ZINGSEM, BENJAMIN
To: UNIVERSITÄT DUISBURG-ESSEN
Reel/Frame 047514/0937 →
Cited By (1)
US 12,340,831