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 New
publications
Ferromagnetic resonance study of
polycrystalline Fe1-xVx
alloy
thin films, J-M. L. Beaujour et al.,
accepted for publication in J. Appl. Phys. (2008)
MMM
Meeting 5-9 Nov. 2007 - Tampa
I will give a
contributed talk of 10 minutes.
The title: "Ferromagnetic
resonance study of polycrystalline Fe1-xVx
alloy thin films". link
MISC
ENGAUGE DIGITIZER
A must have for engineers and scientists, and it's FREE. This freeware
enables to extract data from images of graphs and charts. You just import
the image, identify a few axis points, and let the program take care of the
rest. The points can be exported in a csv file.
link
MIMETEX
Amazing cgi script that enables to embed TeX-style mathematical equations in
html pages. For more info
link
Toshiba Satellite - How to recover a dying laptop?
If like me, your Toshiba does not stop shutting down because the CPU
overheats, you should try this before sending the laptop to Toshiba. I spend
30 minutes with a gun of compressed air to clean up the back of the
computer-remove all the dust on the fans and motherboard. No need to
dismount the keyboard or any other parts. Since then, I never experienced a
single issue of overheating of the CPU. The cooling system works so fine
that I can run GraphEdit + VMWare + WinDVD all in the same time without
problem.
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NANOTECHNOLOGY AND PHYSICS ...
Today's forefront
technological applications of magnetic materials are based on the
manipulation of the magnetization on nanosecond
time scales and mesoscopic length scales.
Examples are magnetization changes in lithographically produced
recording heads and memory cells or the writing of magnetic "bits"
on recording disks. In all cases the key process involves switching of
the mesoscopic magnetic state by an applied magnetic field that is
generated by an electromagnet.
The challenge in
magnetism today is the development of new methods of magnetization
control that overcomes the limits imposed by classical electromagnetism
such as the long range and slow spatial decay of regular magnetic fields
and their limited rise -and decay- time imposed by the induction laws.
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New York
City
March 2005
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FERROMAGNETIC RESONANCE MEASUREMENTS OF ULTRATHIN FILMS
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The dynamics of the magnetization in ultrathin films is attracting particular attention from physicists in particular with the development of spintronic devices.
FMR is a very useful and efficient technique that provides a lot of information on the magnetic characteristics of a film. The frequency dependence of the resonance field
enables to extract the g-factor, the anisotropy fields. The linewidth
of the absorption curve allows the estimate of the Gilbert damping, the investigation on the quality of the films, magnetic inhomogeneities and
roughness.
We are carrying out measurements on magnetic layered films grown by
electron-beam/thermal evaporation where the thickness ranges from 1nm up to 20nm. Home-made coplanar waveguides are used to generate homogeneous ac magnetic field..........
Read
more POSTDOCTORAL
RESEARCH PROJECTS
since September 2003 (in progress)
Prof. Kent Research Group, Mesoscopic magnetism
New
York University, New York |
The Coplanar Waveguide is mounted in a rectangular
brass cavity. The system enables to conduct frequency broadband Ferromagnetic
Resonance measurements (designed with
PovRay). |
PUBLICATIONS FROM MY CURRENT RESEARCH:
· Ferromagnetic
resonance study of polycrystalline Fe1-x Vx alloy thin films
J-M. L. Beaujour, J. Z. Sun, A. D. Kent,
accepted for publication in J. Appl. Phys. (2008)
· Ferromagnetic
resonance study of Co|Ni multilayers
J-M. L. Beaujour, W.
Chen, K. Krycka, C-C. Kao, J. Z. Sun, A. D. Kent,
Eur. Phys. J. B (March 2007)
· Magnetization
damping in ultrathin polycrystalline Co films: evidence for non local
effects
J-M. L. Beaujour, J. H. Lee, A.
D. Kent, K. K. Krycka, C-C. Kao, Phys. Rev. B
74, 214405 (2006)
· Ferromagnetic resonance study of
polycrystalline Cobalt ultrathin films
J-M. L. Beaujour, W. Chen, A.
D. Kent, J. Z. Sun, J. Appl. Phys. 99, 08N503 (2006)
ACKNOWLEDGEMENTS IN FOLLOWING
PUBLICATIONS:
·
Spin-Transfer-Driven Ferromagnetic Resonance of Individual Nanomagnets
J.
Sankey et al.,
Phys. Rev. Lett. 96, 227601 (2006)
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