scholarly journals Magnetic anisotropy, magnetostatic interactions and identification of magnetofossils

2012 ◽  
Vol 13 (12) ◽  
Author(s):  
Jinhua Li ◽  
Wenfang Wu ◽  
Qingsong Liu ◽  
Yongxin Pan
Keyword(s):  
Magnetic Anisotropy ◽  
Magnetostatic Interactions

Magnetostatic Interactions of Two-Dimensional Arrays of Magnetic Strips

2010 ◽  
Vol 1250 ◽  
Author(s):  
Leszek Mariusz Malkinski ◽  
Minghui Yu ◽  
Donald Scherer II
Keyword(s):  
Magnetic Anisotropy ◽  
Magnetic Hysteresis ◽  
Resonance Field ◽  
Uniaxial Anisotropy ◽  
Hysteresis Loops ◽  
Resonant Peak ◽  
Magnetic Hysteresis Loops ◽  
Lift Off ◽  
Magnetostatic Modes ◽  
Magnetostatic Interactions

AbstractA series of arrays consisting of Permalloy stripes with dimensions of 100 nm × 300 nm × 1500 nm was fabricated using electron beam nanolithography and magnetron sputtering followed by the lift-off process. In order to elucidate the effect of magnetostatic interactions among nanosized stripes on magnetic properties of the arrays, the separation between the stripes in different arrays was varied in the range between 100 nm and 2000 nm. Magnetic hysteresis loops of the arrays were measured using SQUID magnetometer for different orientations of the applied field with respect to the arrays. Magnetic anisotropy of the arrays was determined based on ferromagnetic resonance measurements at 9.8 GHz using EPR spectrometer. The measurements were carried out for different directions of in-plane magnetic bias filed. The angular dependence of the resonance field of the main resonant peak indicated presence of the uniaxial magnetic anisotropy due to elongated shape of the stripes. Comparison between angular curves of resonant fields for different arrays leads to the conclusion that increasing strength of magnetostatic interactions among the stripes leads to a suppression of the uniaxial anisotropy. The stripes separated by 2000 nm behave almost like non-interacting objects, but the effect of interactions becomes particularly significant for separations smaller than 600 nm. The properties of the arrays with the smallest separations resembled those of continuous films. Magnetostatic modes have been observed in the FMR spectra in addition to the main resonant peak. These modes are believed to result from dimensional confinement of lateral spinwaves in the magnetic stripes. No such modes were observed in the reference samples of solid Py films, with the in-plane applied magnetic field.

TEM Study of Co/Pd and Co/Au Multilayers

1993 ◽  
Vol 51 ◽  
pp. 1036-1037
Author(s):  
A.E.M. De Veirman ◽  
F.J.G. Hakkens ◽  
W.M.J. Coene ◽  
F.J.A. den Broeder
Keyword(s):  
Magnetic Anisotropy ◽  
Ion Beam ◽  
Perpendicular Magnetic Anisotropy ◽  
Optical Recording ◽  
Magnetic Multilayer ◽  
Ion Beam Sputtering ◽  
Cross Sectional ◽  
Transmission Electron ◽  
Beam Sputtering ◽  
Substrate Temperatures

There is currently great interest in magnetic multilayer (ML) thin films (see e.g.), because they display some interesting magnetic properties. Co/Pd and Co/Au ML systems exhibit perpendicular magnetic anisotropy below certain Co layer thicknesses, which makes them candidates for applications in the field of magneto-optical recording. It has been found that the magnetic anisotropy of a particular system strongly depends on the preparation method (vapour deposition, sputtering, ion beam sputtering) as well as on the substrate, underlayer and deposition temperature. In order to get a better understanding of the correlation between microstructure and properties a thorough cross-sectional transmission electron microscopy (XTEM) study of vapour deposited Co/Pd and Co/Au (111) MLs was undertaken (for more detailed results see ref.).The Co/Pd films (with fixed Pd thickness of 2.2 nm) were deposited on mica substrates at substrate temperatures Ts of 20°C and 200°C, after prior deposition of a 100 nm Pd underlayer at 450°C.

MAGNETIC ANISOTROPY OF CARBON DOPED Nd2Fe14B

1985 ◽  
Vol 46 (C6) ◽  
pp. C6-305-C6-308 ◽  
Author(s):  
F. Bolzoni ◽  
F. Leccabue ◽  
L. Pareti ◽  
J. L. Sanchez
Keyword(s):  
Magnetic Anisotropy ◽  
Carbon Doped

ON THE MAGNETIC ANISOTROPY OF THE Y2(Co1-xFex)14B COMPOUNDS

1988 ◽  
Vol 49 (C8) ◽  
pp. C8-579-C8-580
Author(s):  
N. P. Thuy ◽  
T. D. Hien ◽  
N. M. Hong ◽  
J. J. M. Franse
Keyword(s):  
Magnetic Anisotropy

DIFFERENT CONTRIBUTIONS TO THE MAGNETIC ANISOTROPY IN TUBE-SHAPED CoP ALLOYS

1988 ◽  
Vol 49 (C8) ◽  
pp. C8-1307-C8-1308
Author(s):  
G. Rivero ◽  
M. Liniers ◽  
J. M. Gonzalez ◽  
E. Ascasibar
Keyword(s):  
Magnetic Anisotropy

MAGNETIC ANISOTROPY OF TERNARY (TbxGd1-x) Al2 COMPOUNDS

1988 ◽  
Vol 49 (C8) ◽  
pp. C8-449-C8-450
Author(s):  
A. Del Moral ◽  
E. Joven ◽  
M. R. Ibarra ◽  
J. I. Arnaudas ◽  
J. S. Abell ◽  
...  
Keyword(s):  
Magnetic Anisotropy
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