These are Hardware Tasks that receive data from the tester. Measurement Tasks include, but are not limited to:
Hysteresis - This Task measures sample polarization (μC/cm2) response to a Task-applied voltage profile. The profile is of user-specified maximum voltage and period (ms) (Period = 1000/frequency (Hz)). Profiles are normally standard bipolar (triangular), but may be monopolar, double-bipolar, sinusoidal or user-specified.
Small Signal Capacitance - This measurement captures the sample's capacitance as a function of voltage. It measures the capacitance at each voltage step using a very small stimulus signal to eliminate polarization -switching components of the sample response.
PUND - A standard five-pulse ferroelectric sample characterization measurement that captures both switching (remanent + non-remanent) and non-switching (non-remanent) polarization (μC/cm2). Pulse width and voltage are under user control.
Fatigue - Performs a series of stress/measure sequences. In the stress sequence the sample is submitted to a switching waveform. At the end of the waveform period, a PUND measurement is made to capture the sample’s polarization response. Each subsequent stress period may have its duration increased to better serve a logarithmic analysis.
Leakage - Captures the current through a sample induced by a steady-state, DC Bias voltage. Voltage and measurement duration are user-defined.
Curve Energy - Determines the energy returned and the energy lost from a charged capacitor. It is useful for measuring power capacitors for new energy generating systems.
General Monopolar - The General Monopolar Task allows up to five independently configured monopolar Hysteresis measurements to be made in sequence in order to execute a PUND measurement using continuous waveforms. Each measurement may be preceded by an unmeasured presetting pulse or poling DC Bias period.
Optional Tasks Include:
Piezo-Electric - Captures asample’s displacement as a function of voltage profile along with the sample’s polarization response. An external displacement measurement instrument must be attached to the tester to make this measurement.
Magnetoelectric - Radiant’s new Magnetoelectric Response Task allows the user to measure the magnetoelectric coupling coefficient in multiferroic materials and composite magnetopiezoelectric devices. The test stimulates a sample with a small AC magnetic field while measuring its charge generation.
Pyro-Electric - Sets the sample to a series of temperature by performing GPIB control of an external thermal device. At each temperature it captures the sample’s polarization response and/or small-signal capacitance. These are combined to calculate the pyroelectric coefficient.
Transistor - Radiant has introduced an I˛C digital-to-analog converter product that can be attached to the Precision Premier II or Multiferroic Test System and is controlled from Vision. The addition of this extra voltage source makes it possible for the testers to measure the performance of thin-ferroelectric-film gate transistors (TFFTs and MFSFETs).
DLTS - Deep Level Trap Spectroscopy Task allows the user to measure the population of traps filled during a voltage pulse of a non-linear material and measure the decay rate of the trapped population as a function of temperature.
PAINT - PAINT was originally designed to capture the mechanical and acoustic vibrations induced in an ink jet chamber by the pulsing of the piezoelectric element to re an ink droplet. In reality, the PAINT Task in Vision can be used to capture the acoustic response of any activity, including SONAR type measurements in a water tank.