Projected Field Electromagnets - GMW Associates

5201 Horizontal Projected Field

dev_team — Thu, 14 Feb 2019 20:44:06 +0000

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.

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.

5203 Vertical Projected Field

dev_team — Thu, 14 Feb 2019 20:45:03 +0000

The 5203 Electromagnet is a projected field magnet providing uniform field at a location above the magnet surface. It is intended for applications where the space around the working volume needs to be freely accessible.

Poles are interchangeable and are available with an axial access bore. The 5203 can be mounted in any orientation and light weight (2.5kg) allows the magnet to be integrated into dynamic applications such as wafer testing.

5204 Vector Projected Field

dev_team — Thu, 14 Feb 2019 20:45:50 +0000

The 5204 Electromagnet is a projected vector field magnet providing field of any orientation at a location above the magnet surface. It is intended for applications where the space around the working volume needs to be freely accessible. A clear path exists all the way through with Ø2.5mm, this allows optical access from the beneath.

Custom pole extensions may be located on the pole faces in order to achieve desired field properties for a specific application. The 5204 can be mounted in any orientation and the light weight (2.5kg) allows the magnet to be integrated into dynamic applications such as wafer testing.

5205 Vertical Projected Field

dev_team — Thu, 14 Feb 2019 20:46:21 +0000

The 5205 Electromagnet is a low profile projected vertical field magnet providing uniform Bz field at a location above the magnet surface. It is intended for applications where the space around the working volume needs to be freely accessible.

The 5205 can be mounted in any orientation and the light weight (1.3kg) allows the magnet to be integrated into dynamic applications such as wafer testing.

The 5205 is designed to operate up to 100°C in order to determine the performance of the device under test in both magnetic field and at temperature.

5207 Vertical Projected Field

Ben Hartzell — Wed, 24 Apr 2019 13:24:46 +0000

The 5207 is a system primarily designed for integration into probe stations for MRAM test. The location of the pole face can be adjusted precisely to be located relative to the DUT with high accuracy.

HTS-110 2T Projected Field

Ben Hartzell — Fri, 26 Apr 2019 22:57:50 +0000

Compact HTS-110 Magnet with 2T Bz field perpendicular to the surface of the magnet.

Applications

MOKE (Magneto-OMagnetic probing systems
Scanning Probe Microscope (SPM)
Scanning Tunnelling microscope (STM)
Atomic Force Microscope (AFM)
Magnetic Force Microscope (MFM)
Magneto-optic measurement
Hall effect measurement