scholarly journals Electron Holography of Nanostructured Magnetic Materials

1999 ◽  
Vol 589 ◽  
Author(s):  
R. E. Dunin-Borkowski ◽  
B. Kardynal ◽  
M. R. Mccartney ◽  
M. R. Scheinfein ◽  
David J. Smith
Keyword(s):  
Magnetic Materials ◽  
Magnetization Reversal ◽  
Electron Holography ◽  
Magnetic Elements

AbstractOff-axis electron holography and micromagnetic calculations that involve solutions to the Landau-Lifshitz-Gilbert equations are used to study magnetization reversal processes in lithographically patterned submicron-sized Co and Co/Au/Ni magnetic elements.

scholarly journals Micromagnetic Simulations of Fe and Ni Nanodot Arrays Surrounded by Magnetic or Non-Magnetic Matrices

Nanomaterials ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 349
Author(s):  
Devika Sudsom ◽  
Andrea Ehrmann
Keyword(s):  
Magnetic Materials ◽  
Data Storage ◽  
Magnetization Reversal ◽  
Hysteresis Loops ◽  
Object Oriented ◽  
Basic Research ◽  
Memory Systems ◽  
The Other ◽  
Micromagnetic Simulations ◽  
Nanodot Arrays

Combining clusters of magnetic materials with a matrix of other magnetic materials is very interesting for basic research because new, possibly technologically applicable magnetic properties or magnetization reversal processes may be found. Here we report on different arrays combining iron and nickel, for example, by surrounding circular nanodots of one material with a matrix of the other or by combining iron and nickel nanodots in air. Micromagnetic simulations were performed using the OOMMF (Object Oriented MicroMagnetic Framework). Our results show that magnetization reversal processes are strongly influenced by neighboring nanodots and the magnetic matrix by which the nanodots are surrounded, respectively, which becomes macroscopically visible by several steps along the slopes of the hysteresis loops. Such material combinations allow for preparing quaternary memory systems, and are thus highly relevant for applications in data storage and processing.

scholarly journals Direct Observation of Nanoscale Magnetization Reversal and Spin Dynamics Using In-Situ Lorentz Microscopy and Electron Holography

2010 ◽  
Vol 16 (S2) ◽  
pp. 576-577
Author(s):  
L Huang ◽  
Y Zhu
Keyword(s):  
Direct Observation ◽  
Magnetization Reversal ◽  
Spin Dynamics ◽  
Electron Holography ◽  
Lorentz Microscopy

Extended abstract of a paper presented at Microscopy and Microanalysis 2010 in Portland, Oregon, USA, August 1 – August 5, 2010.

TEM and electron holography analyses of granular and thin layered Cu–Co magnetic materials

2010 ◽  
Vol 110 (5) ◽  
pp. 433-437 ◽  
Author(s):  
B. Dubiel ◽  
D. Wolf ◽  
A. Czyrska-Filemonowicz
Keyword(s):  
Magnetic Materials ◽  
Electron Holography

Evolution of magnetization reversal on patterned magnetic elements

2000 ◽  
Vol 36 (5) ◽  
pp. 2978-2980 ◽  
Author(s):  
J.C. Wu ◽  
H.W. Huang ◽  
Te-Ho Wu
Keyword(s):  
Magnetization Reversal ◽  
Magnetic Elements

scholarly journals Electron Holography of Magnetic Materials

10.5772/22366 ◽  
2011 ◽  
Author(s):  
Takeshi Kasama ◽  
Rafal E. ◽  
Marco Beleggi
Keyword(s):  
Magnetic Materials ◽  
Electron Holography

Micromagnetic Simulations Of Domain Structures In Thin Films And Bulk Hard Magnets

1999 ◽  
Vol 5 (S2) ◽  
pp. 36-37
Author(s):  
Zhi-Xiong Cai ◽  
Yimei Zhu
Keyword(s):  
Thin Films ◽  
Magnetic Materials ◽  
Domain Structure ◽  
Easy Axis ◽  
Magnetic Thin Films ◽  
Magnetic Films ◽  
Electron Holography ◽  
Bulk Materials ◽  
Hard Magnetic Materials ◽  
Domain Structures

The shape anisotropy of a magnetic thin film competes with the easy-axis anisotropy, which gives rise to different domain structures compared to the bulk magnetic materials. Recent Lorentz microscope and electron holography and differential-phase-contrast experiments show complex domain structures with features not found in bulk materials seen by magneto-optic method.In this report we use micromagnetic simulation techniques to study the effect of thickness on the domain structure of magnetic thin films with various orientations relative to the easy axis and compare with those in the bulk materials. The results of the simulations can be used to compare with the data obtained using electron holography experiments to give us quantitative understanding of the domain structure in hard magnetic materials.We model the magnetic films with an array of dipoles of size 16×l6×Lz, where Lz the thickness of the sample.

Influence of magnetostatic interactions on the magnetization reversal of patterned magnetic elements

2011 ◽  
Vol 109 (7) ◽  
pp. 07D354 ◽  
Author(s):  
Xioalu Yin ◽  
S. H. Liou ◽  
A. O. Adeyeye ◽  
S. Jain ◽  
Baoshan Han
Keyword(s):  
Magnetization Reversal ◽  
Magnetic Elements ◽  
Magnetostatic Interactions

Remanent states and magnetization reversal of nanopatterned spin-valve elements using off-axis electron holography

2009 ◽  
Vol 105 (7) ◽  
pp. 07D517 ◽  
Author(s):  
Kai He ◽  
David J. Smith ◽  
Martha R. McCartney
Keyword(s):  
Magnetization Reversal ◽  
Spin Valve ◽  
Electron Holography
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