|
|
|
GMW Projected Field Electromagnet, 5201
 |
| |
 By
"projecting" magnetic field outside the Model
5201 Electromagnet, a volume of approximately
uniform magnetic flux density is made available for magnetic
measurements on small samples. Open access to the sample
surface is available for diagnostic probes and radiation
from laser and synchrotron radiation sources.
The Bx component of the field is uniform to +/-1% in a
planar, thin volume of 2 x 10 x 0.2mm (x, y, z) which
is particularly appropriate for studies of in-plane effects
in planar samples oriented parallel to the Electromagnet
surface.
Bx can be computer or manually controlled over the range
of +/-0.4T (4000G) at z = 2mm from the Electromagnet surface,
decreasing to a range of +/-0.1T(1000G) at z = 12mm.
The Bz component of the field approaches a range of +/- 0.30T (3000G) as the distance X(mm), x=0 being an equidistant distance between the two poles, at +/-5mm. As the x distance approaches 0 the Bz component of the field also approaches 0. View graph
Small size and low weight enable the 5201 to be mounted
in any orientation on standard transverse and rotary motion
stages for accurate control of the projected field in
position and angle with respect to the sample. The 5201
projected field can be introduced into a vacuum chamber
or cryostat via a reentrant tube of 100mm (3.9inch) inside
diameter and an appropriate non-magnetic window.
Applications
• Development
and quality control measurements of in-plane magnetic
field effects in magnetic thin films, magnetic media and
magnetic devices such as FeRAM and MRAM. The open geometry
reduces the difficulties of access to the sample surface
for radiation beams for MOKE (Magneto-Optic Kerr Effect)
and SMOKE (Surface MOKE).
• Scanning
Probe Microscopy utilizing Scanning Electron Microscopy
with Polarization Analysis (SEMPA), Scanning Tunneling
Microscopes (STM) or Atomic Force Microscopes (AFM) is
more easily implemented by the open access to the sample
surface.
• Calibration
and test cycle times for Hall effect, MR (Magneto Resistive)
and GMR (Giant MR) magnetic field sensors can be reduced
by simplified robotics for device handling and faster
control of field magnitude and direction.
• Chemical
reaction rates and biological sample activity in magnetic
fields may be more readily monitored because of the improved
access for electrical and optical probes.
Last updated on:
10 March, 2008
|
|
|
|
 |
|
