scholarly journals Interactions and reversal-field memory in complex magnetic nanowire arrays

2011 ◽  
Vol 84 (13) ◽  
Author(s):  
Aurelian Rotaru ◽  
Jin-Hee Lim ◽  
Denny Lenormand ◽  
Andrei Diaconu ◽  
John. B. Wiley ◽  
...  
Keyword(s):  
Nanowire Arrays ◽  
Magnetic Nanowire ◽  
Reversal Field

scholarly journals Facile decoding of quantitative signatures from magnetic nanowire arrays

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Mohammad Reza Zamani Kouhpanji ◽  
Ali Ghoreyshi ◽  
P. B. Visscher ◽  
Bethanie J. H. Stadler
Keyword(s):  
Nanowire Arrays ◽  
Magnetic Nanowires ◽  
Linear Combinations ◽  
First Order ◽  
Individual Type ◽  
Magnetic Nanowire ◽  
Data Points ◽  
Reversal Field ◽  
The Individual ◽  
Contact Free

Abstract Magnetic nanoparticles have been proposed as contact-free minimal-background nanobarcodes, and yet it has been difficult to rapidly and reliably decode them in an assembly. Here, high aspect ratio nanoparticles, or magnetic nanowires (MNWs), are characterized using first-order reversal curves (FORC) to investigate quantitative decoding. We have synthesized four types of nanowires (differing in diameter) that might be used for barcoding, and identified four possible “signature” functions that might be used to quickly distinguish them. To test this, we have measured the signatures of several combination samples containing two or four different MNW types, and fit them to linear combinations of the individual type signatures to determine the volume ratios of the types. We find that the signature which determines the ratios most accurately involves only the slope of each FORC at its reversal field, which requires only 2–4 data points per FORC curve, reducing the measurement time by a factor of 10 to 50 compared to measuring the full FORC.

Self-assembled magnetic nanowire arrays

2007 ◽  
Vol 90 (10) ◽  
pp. 103105 ◽  
Author(s):  
Ming Liu ◽  
Jalal Lagdani ◽  
Hassan Imrane ◽  
Carl Pettiford ◽  
Jing Lou ◽  
...  
Keyword(s):  
Nanowire Arrays ◽  
Magnetic Nanowire ◽  
Self Assembled

Self-assembled magnetic nanowire arrays

2006 ◽  
Author(s):  
J. Lagdani ◽  
H. Imrane ◽  
C. Pettiford ◽  
J. Lou ◽  
S. D. Yoon ◽  
...  
Keyword(s):  
Nanowire Arrays ◽  
Magnetic Nanowire ◽  
Self Assembled

SYNTHESIS OF COBALT NANOTUBULES AND CHARACTERIZATION OF MAGNETIZATION DYNAMICS

2011 ◽  
Vol 10 (04n05) ◽  
pp. 641-646 ◽  
Author(s):  
SACHIN PATHAK ◽  
SUKHVINDER SINGH ◽  
MANISH SHARMA
Keyword(s):  
Nanowire Arrays ◽  
Magnetic Recording Media ◽  
Magnetization Dynamics ◽  
Cobalt Nanowires ◽  
Micromagnetic Modeling ◽  
Magnetic Nanowire ◽  
High Density Magnetic Recording ◽  
Poly Carbonate ◽  
Unique Capability

Magnetic nanowire arrays formed by templated electrodeposition are a promising way of making ultra-high density magnetic recording media. We have used both Poly Carbonate Track Etched (PCTE) and Anodic Aluminum Oxide (AAO) membranes to obtain Cobalt nanowires. Also by suitably adjusting the electrodeposition process, hollow Cobalt nanotubules were formed. The hollow cylindrical structure gives a unique capability to tailor their magnetization. The morphology of the samples was investigated using SEM and TEM. Magnetic characterization done using SQUID shows the influence of morphology and that the nanotubules have rather different switching behaviour than solid nanowires. Finite element micromagnetic modeling was performed of a single nanowire, a single nanotubule and also arrays of nanotubules. The calculated static M-H curves were found to match closely the SQUID measurements. The coercivity increases with length while the inner and outer diameters greatly affect rotational switching of the magnetization.

scholarly journals Stability of Bar Code Information Stored in Magnetic Nanowire Arrays

2017 ◽  
Vol 2017 ◽  
pp. 1-8
Author(s):  
Eduardo Cisternas ◽  
Eugenio E. Vogel ◽  
Julián Faúndez
Keyword(s):  
Magnetic Material ◽  
Triangular Lattice ◽  
Porous Alumina ◽  
Nanowire Arrays ◽  
Bar Code ◽  
Bar Codes ◽  
Repulsive Energy ◽  
Magnetic Nanowire ◽  
Magnetization Orientation ◽  
Stored Information

Firmware applications such as security codes, magnetic keys, and similar products can be stored in magnetic bar codes similar to optical bar codes. This can be achieved on the triangular lattice present in porous alumina, whose pori can be filled by magnetic material, over which magnetic bar codes can be inscribed. We study the conditions to improve the durability of the stored information by minimizing the repulsive energy among wires with parallel magnetization within the same bar but interacting with attractive energy with wires in the neighboring bar. The following parameters are varied to minimize the energy of the system: relative amount of magnetization orientation within the bar code area in any orientation, width of the bars, and distribution of wider bars to the outside or to the inside of the code. It is found that durability of the code is favored for equal amount of magnetization in each direction, abundance of narrow bars trying to locate a few wider ones towards the center. Three real commercial optical bar codes taken at random were mapped into magnetic bar codes; it is found that the corresponding magnetic energies are similar to those analyzed here which provides a realistic test for this approach.

Spin-Wave Resonances Affected by Skin-Effect in Conducting Magnetic Nanowire Arrays at Terahertz Frequencies

2011 ◽  
Vol 47 (2) ◽  
pp. 313-316 ◽  
Author(s):  
Martha Pardavi-Horvath ◽  
Galina S. Makeeva ◽  
Oleg A. Golovanov
Keyword(s):  
Spin Wave ◽  
Skin Effect ◽  
Nanowire Arrays ◽  
Magnetic Nanowire ◽  
Terahertz Frequencies

scholarly journals Static and dynamic magnetic properties of densely packed magnetic nanowire arrays

2013 ◽  
Vol 87 (17) ◽  
Author(s):  
O. Dmytriiev ◽  
U. A. S. Al-Jarah ◽  
P. Gangmei ◽  
V. V. Kruglyak ◽  
R. J. Hicken ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Nanowire Arrays ◽  
Magnetic Nanowire
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