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Resistivity / Hall Effect Package
 Abbess Instruments Resistivity / Hall Effect ProbesInstrument package (IPACK-1)Voltage/Current SourceNanovoltmeterRelay Matrix |
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 leadless sample carrier |
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| The Resistivity / Hall Effect probes designed and built to fit any ABBESS cryostat, to allow the customer to measure resistance changes as small as 10-6 ohm. The probe has a theoretical sensitivity of about 10-8 ohm:
The probes can accept samples up to the limits of the cryostat used. The probes typically has a minimum of 4 contacts, but may have up to 256. The Instrument Packages' (IPACK-1) contains a voltage/current source that supplies current from 100 micro amp to 10.1 amp with an accuracy of ±(0.l % + 0.1 mA) at the low end and ±(0.5% + 10 mA) at the high end. The IPACK-l's nanovoltmeter can read from 10nV to 1000V with accuracies of ±(0.006% + 5nV) at the low end and ±(0.005% + 1.5V) at the high end. The IPACK-1 can interface with the optional system controller(computer). |
| General Technical Specifications (Specifications may vary depending on final configuration) |
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| Resistivity Measurement | Sensitivity 10-7ohms or better; theoretical sensitivity 10-9 ohmsUses quasi-DC measurement technique to avoid effects of sample inductance and capacitance while canceling thermal emf; complete measurements every 2 seconds over IEEE-488 busRange 10-7 to 2 ohms (optional to 1000 ohms)Precision ±0.1%; accuracy (1 year) ±0.1% for R> 10-4 ohms; ±0.5% for 10-6< R < 10-4 ohms |
| Current Control | Minimum current is 0.1 nAMaximum current is 10.1 amp |
| Voltage Measurement | Recommended Nanovoltmeter: 10 nV resolution, 5.5-6.5 digit resolution, ranges to 1000 V, IEEE-488 interface |
| Current/Voltage source | Recommended Voltage/Current Source: 100 mA to 10 A or 1 V to 100 V full scale output with 3 digit resolution, 100 watts, IEEE-488 interface |
| Sample Environments (Dependent on Cryostat Used) | |
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| Cryostat CTC-1 | Range: 4K to 925KStability: Dependent on temperature controller selectedRate of Change: 300K to 77K in 5 minutes, 300K to 925K in 30 minutesSample environment is isolated from cryogen chamber allowing user to choose gases or vacuum which will be in contact with the sampleSample Size: Up to .500 inch x 1.00 inch x .050 inch thick; max. electrical contacts 12 |
| Cryostat CTC-2 | Range: 1 0K to 1000KStability: Dependent on temperature controller selectedRate of Change: 300K to 77K in 1 0 minutes, 300K to 800K in 30 minutesSample environment is isolated from cryogen chamber allowing user to choose gases or vacuum which will be in contact with the samplePressure: 10-6 Torr to 500 psigSample Size: Up to 1.00 inch x 2.00 inch x .500 inch thick; max. electrical contacts 24 |
| Cryostat CTC-6 | Range: 4K to 425KStability: Dependent on temperature controller selectedSample plate is copper cold finger to minimize gradientsCryostat is table or desk mountableSample Size: Up to 1 inch x 1.25 inch; max. electrical contacts 256 |
Faraday and Hall Measurement System
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