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VFM2 Variable Field Module

Photonics.com
Nov 2011
Asylum ResearchRequest Info
 
SANTA BARBARA, Calif., Nov. 10, 2011 — For applications with MFP-3D atomic force microscopes (AFMs), Asylum Research has introduced the variable field module2 (VFM2).

The module is intended for use by researchers who want to apply magnetic fields to their atomic force microscopy experiments. It applies continuously adjustable magnetic fields parallel to the sample plane approaching 1 T with one Gauss resolution. The module is useful for magnetic force microscopy, conductive AFM and other applications where the sample’s properties are magnetic field-dependent.

The VFM2 easily attaches to the MFP-3D AFMs and features adjustable pole tips for optimal choice between maximum required field, sample placement and minimum field gradients. It incorporates rare-earth magnets to produce the magnetic field. Maintaining a steady field produces no heat, thermal drift or mechanical vibration. Field intensity is software-controllable. An integrated Gaussmeter provides a quantitative measurement of the applied magnetic field.

For experiments where combined magnetic field and a high tip-sample voltage bias are required, such as for studies of ferroelectric and piezoelectric materials, the VFM2 high-voltage kit can be easily attached to the VFM2. The kit allows application of tip biases up to ±220 V.

The company says that, prior to the introduction of the VFM2, high magnetic field measurements required complicated superconducting or water-cooled magnets, neither of which were friendly to low-noise, high-precision AFM measurements.


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