IV Curve¶
see also Temperature Calibration
The IV curve panel (Figure 62, 63) provides functionality to calibrate the micro-heater temperatures of both the reader and writer cantilever channels.
Open the IV curve panel
IV Curve Tab¶
Cantilever Channel: Reader or Writer
Height (nm): Cantilever height above sample surface during IV curve operation
If the distance to the surface is unknown the IV curve will be performed at the minimum Z-piezo extension.
Applied Voltages: A series of voltages are applied to the cantilever channel, and the currents passing through are measured
Min (V): Minimum applied voltage
Max (V): Maximum applied voltage
Step (V): Incremental step between the applied voltages
Tempo (µs): Time interval between applied voltages
Stopping Factor: Safeguard relative to the cantilever channel power at the knee point
Knee Point: A yellow circular marker in the IV curve graph indicates the knee point of the cantilever channel where the micro-heater has maximum resistance
Results Tab¶
The following quantities can be plotted against each other for each cantilever channel:
- Voltage applied to the cantilever channel
- Voltage across the series resistor
- Current through the micro-heater
- Voltage across the micro-heater
- Resistance of the micro-heater
- Power of the micro-heater
- Estimated temperature of the micro-heater
API Functions¶
See: NFAPI IV Curve