Physical Properties Measuring System (PPMS)

The Quantum Design Physical Properties Measuring System (PPMS) is an open architecture research equipment, working at variable temperature and magnetic field environments. Designed to perform a variety of automated measurements.  In our instrument we can change the magnetic fields up to ±9 T and to collect magnetic, resistivity and heat capacity data, in the temperature range of 1.9 - 400 K.

Our instrument include the  following measurement Options:

• AC Susceptibility (ACMS II)

The AC Measurement System utilizes a mutual induction-based technique to determine a sample's dynamic (AC) susceptibility. The system also enables the user to perform DC magnetization measurements.   AC moment sensitivity of 10-8 emu, AC excitation fields of 0.05 – 15 Oe are available at frequencies from 10 Hz – 10 kHz

• Horizontal Rotator

The Horizontal Rotator enables a transport sample to be rotated over a full 360° in the presence of an applied magnetic field. An automated indexing procedure and encoder ensures accurate angular positions and the on-board thermometer monitors the temperature in close proximity to the sample. Rotate a sample between -10° – 370° to change the orientation of the applied magnetic field relative to the installed sample    Motor available in Standard Resolution (0.0133°/step) and High Resolution (0.0011°/step) versions

• DC Resistance

Quantum Design PPMS Resistivity Electrical Transport Option Puck DC resistance on up to three channels using a standard puck can be measured using the DC Resistivity Option.   Measure resistances of 10 μΩ – 5 MΩ in a standard 4-probe configuration   Source currents between 2 nA – 8 mA     Configurable bridge parameters to limit the voltage, current, or power at the sample for protecting sensitive devices, films, etc.

• Heat capacity

High-precision microcalorimetry experiments can be performed using the Heat Capacity option to measure a sample's heat capacity as a function of temperature. Measurements in a static applied magnetic field are also possible using the automated field calibration function of the software.     Typical addenda signal of 0.2 μJ/K at 2 K, where signal resolution is 2 nJ/K     Software automates the collection of addenda (background) signal and performs the necessary subtraction for determining the sample's heat capacity