scholarly journals Micromagnetic simulations of first-order reversal curves in nanowire arrays using MuMax3

AIP Advances ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 125130
Author(s):  
R. G. Eimerl ◽  
K. S. Muster ◽  
R. Heindl
Keyword(s):  
Nanowire Arrays ◽  
Micromagnetic Simulations ◽  
First Order

First order reversal curve investigation of the hard and soft magnetic phases of annealed CoFeCu nanowire arrays

2013 ◽  
Vol 429 ◽  
pp. 46-51 ◽  
Author(s):  
M. Almasi-Kashi ◽  
A. Ramazani ◽  
E. Golafshan ◽  
M. Arefpour ◽  
E. Jafari-Khamse
Keyword(s):  
Nanowire Arrays ◽  
Soft Magnetic ◽  
Magnetic Phases ◽  
First Order

ChemInform Abstract: Extracting Individual Properties from Global Behaviour: First-Order Reversal Curve Method Applied to Magnetic Nanowire Arrays

ChemInform ◽  
2013 ◽  
Vol 44 (43) ◽  
pp. no-no
Author(s):  
Fanny Beron ◽  
Louis-Philippe Carignan ◽  
David Menard ◽  
Arthur Yelon
Keyword(s):  
Nanowire Arrays ◽  
First Order ◽  
Global Behaviour ◽  
Magnetic Nanowire ◽  
Curve Method

scholarly journals A Novel Design of a 3D Racetrack Memory Based on Functional Segments in Cylindrical Nanowire Arrays

Nanomaterials ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 2403
Author(s):  
Javier Rial ◽  
Mariana P. Proenca
Keyword(s):  
Low Cost ◽  
Memory Device ◽  
Nanowire Arrays ◽  
High Yield ◽  
Magnetic Domains ◽  
Micromagnetic Simulations ◽  
Current Pulses ◽  
Spin Polarized ◽  
Innovative Idea ◽  
Vertically Aligned

A racetrack memory is a device where the information is stored as magnetic domains (bits) along a nanowire (track). To read and record the information, the bits are moved along the track by current pulses until they reach the reading/writing heads. In particular, 3D racetrack memory devices use arrays of vertically aligned wires (tracks), thus enhancing storage density. In this work, we propose a novel 3D racetrack memory configuration based on functional segments inside cylindrical nanowire arrays. The innovative idea is the integration of the writing element inside the racetrack itself, avoiding the need to implement external writing heads next to the track. The use of selective magnetic segments inside one nanowire allows the creation of writing and storage sections inside the same track, separated by chemical constraints identical to those separating the bits. Using micromagnetic simulations, our study reveals that if the writing section is composed of two segments with different coercivities, one can reverse its magnetization independently from the rest of the memory device by applying an external magnetic field. Spin-polarized current pulses then move the information bits along selected tracks, completing the writing process by pushing the new bit into the storage section of the wire. Finally, we have proven the efficacy of this system inside an array of 7 nanowires, opening the possibility to use this configuration in a 3D racetrack memory device composed of an array of thousands of nanowires produced by low-cost and high-yield template-electrodeposition methods.

First-Order Reversal Curves Diagrams of Ferromagnetic Soft Nanowire Arrays

2006 ◽  
Vol 42 (10) ◽  
pp. 3060-3062 ◽  
Author(s):  
F. Beron ◽  
L. Clime ◽  
M. Ciureanu ◽  
D. Menard ◽  
R.W. Cochrane ◽  
...  
Keyword(s):  
Nanowire Arrays ◽  
First Order

scholarly journals Magnetic switching of nanoscale antidot lattices

2016 ◽  
Vol 7 ◽  
pp. 733-750 ◽  
Author(s):  
Ulf Wiedwald ◽  
Joachim Gräfe ◽  
Kristof M Lebecki ◽  
Maxim Skripnik ◽  
Felix Haering ◽  
...  
Keyword(s):  
Nanosphere Lithography ◽  
Magnetic Film ◽  
Micromagnetic Simulations ◽  
First Order ◽  
Magnetic Switching ◽  
Out Of Plane ◽  
Magnetic Microscopy ◽  
The Rich ◽  
Microscopy Techniques

We 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.

Magnetostatic Interactions and Coercivities of Ferromagnetic Soft Nanowires in Uniform Length Arrays

2008 ◽  
Vol 8 (6) ◽  
pp. 2944-2954 ◽  
Author(s):  
F. Béron ◽  
L. Clime ◽  
M. Ciureanu ◽  
D. Ménard ◽  
R. W. Cochrane ◽  
...  
Keyword(s):  
Nanowire Arrays ◽  
Physical Parameters ◽  
Preisach Model ◽  
General Shape ◽  
First Order ◽  
Average Value ◽  
Interaction Field ◽  
Soft Ferromagnetic ◽  
Out Of Plane ◽  
Magnetostatic Interactions

First-order reversal curve diagrams have been used to investigate magnetostatic interactions and average coercivity of individual wires in soft ferromagnetic uniform length nanowire arrays. We present a method for identifying these physical parameters on the out-of-plane first-order reversal curve diagrams: the position of the irreversible part on the critical axis is a good approximation to the average value of the nanowire coercivity and the maximum interaction field is equal to the interaction field at saturation. Their dependence upon material (CoFeB and Ni) and nanowire length are presented. The magnetostatic interactions increase linearly with length, in agreement with a model developed previously. The global array coercivity, obtained from magnetization curves, is generally lower than the apparent average coercivity for individual nanowires. This coercivity reduction increases linearly with the magnetostatic interactions. The general shape of the out-of-plane first-order reversal curve diagrams is compared with those obtained from a theoretical moving Preisach model.

Correlation between microstructure and first-order-reversal-curve of Co nanowire arrays

2015 ◽  
Vol 90 (8) ◽  
pp. 085803 ◽  
Author(s):  
M Almasi-Kashi ◽  
A Ramazani ◽  
S Izadi ◽  
E Jafari-Khamse
Keyword(s):  
Nanowire Arrays ◽  
First Order
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