Experimental Setup
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MO with Electric Transport Experimental setup
The MO setup has been improved for magneto-optical and dc electrical transport joined measurements.
The new set up includes:
è
DC current generator Keithley Mod. 224
è 2 channel digital voltmeter Keithley
Mod. 2182
A further improvement is in progress: the setup will be integrated with an electric transport measurement setup for fast signal detection.
The main component for the new experimental set up is the ACQIRIS Mod. DP240 8-bit Digitizer board, dual-channel (2GSampling/s).
The 8MB total memory, together with the high frequency bandwidth will allow fast sampling rate and therefore good timing resolution. The fast sampling rate ensures that all high-frequency signal components, up to the full bandwidth of the digitizer, are accurately recorded.
The system will be completed by high quality electronic components for noise reduction.
Data acquisition will be controlled by means of Labview custom-developed software, using the original Acqiris drivers, for full integration and compatibility with the pre-existing magneto-optical measurements software.
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Oxford cryostat (custom-design) Temperature operative range: 4 – 350 K
è Oxford electromagnet (custom-design)
Magnetic field up to 0.18 T
è Optiphot Nikon Microscope with a Glan-Taylor
polarizer, rotating analyzer and excitation filter in the wavelength range 525-540
nm
è Keithley Mod. 224 current generator
è Keithley Mod. 2182 nanovoltmeter for
dc measurements