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.

ivc Open the IV curve panel

IV Curve Tab

nf_ivc_panel_tab0

Figure 62 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

nf_ivc_panel_tab1

Figure 63 IV Curve 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