NHMFL@FSU has installed a Bruker Model IFS 113v Fourier transform infrared
spectrometer. The specifications of the spectrometer and its accessories are:
- Range: 10,000 to 10 cm-1
- Resolution: Better than 0.03 cm-1
- Sources: SiC glowbar, W lamp, and Hg lamp
- Beamsplitters: Ge on KBr, 4 mylar films and CaF2
- Detectors: DTGS with KBr and polyethylene windows, Si bolometer with dewar
and preamp, InSb detector with dewar and preamp
- Automation: 3 sources, 4 apertures, 4 filters, 6 beam splitters, and 4
detectors
- Sample holders: A cryostat with light pipe and sample changer for
transmission measurements and a cryostat with light pipes for reflection
measurements may be used in the superconducting and resistive magnets in the
Tallahassee facility. Sample temperatures can be controlled between 1.6 and
100 K. The sample can be angled between 60 and 90 degrees to the field
direction. We have recently found that excellent measurements can be made at
frequencies up to 3000 cm-1 with the light pipe system.
An
infrared laser is available for use in transmission and reflection measurements
and for optical pumping. The laser is shared with the Electron Magnetic
Resonance group of CIMAR for electron spin resonance in high magnetic fields.
There has been vigorous discussion with present and prospective users of
facilities for infrared research in high fields. All agreed that the equipment
must be user friendly. A big part of that is having someone locally to use,
maintain and improve the equipment and to help users. The NHMFL therefore
supports research in semiconductor physics using IR spectroscopy as part of its
in-house science program.
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Curator: Scott Hannahs <sth@magnet.fsu.edu>
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