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MPMS, PPMS, CCMS

JCNS-2 is equipped with powerful state-of the-art instruments to characterize samples with respect to the following physical properties as function of both magnetic field and temperature:

  • Magnetization
  • AC susceptibility
  • Torque magnetometry
  • Heat capacity
  • Thermal transport properties
  • Electrical transport properties
  • Hall effect
  • Seebeck coefficient

MPMS-XL SQUID Magnetometer from Quantum Design allows to measure the magnetization (or more precisely the magnetic moment) and the AC susceptibility at various applied magnetic fields between -7 and +7 T and temperatures between 1.9 and 400 K. Scans can be programmed as function of field, temperature or time as automated sequences, e.g. hysteresis loops, ZFC/FC temperature measurements, magnetization relaxation curves, etc. The sensitivity is 10-8 emu. E.g. cobalt ultrathin films with a nominal thickness of 0.5 nm are routinely measurable. The samples should have a size not exceeding roughly 7mm x 7mm x 7mm and can be bulk crystals, thin films, nanoparticles, etc.

MPMS.png

PPMS system from Quantum Design widens the possible methods to measurements of the heat capacity, thermal transport properties, electrical transport properties or the Seebeck coefficient in applied magnetic fields between -9 and 9 T and temperatures between 1.9 and 400 K. Furthermore, the magnetization and AC susceptibility can also be measured using the PPMS system although with a slightly lower sensitivity of ~10-6 emu compared to the MPMS system. In addition, the PPMS can also be used as a torque magnetometer, which provides information about magnetic anisotropies.

CCMS.pngThe CCMS measurement platform with 0-14 T magnetic field and 1.6-325 K temperature range. Inset: AC-specific heat option for µg samples.

Closed Cycle Measurement System (CCMS) built by Cryogenics Ltd provides a flexible measurement platform for magnetic fields up to 14 T in a temperature range between 1.6 and 325 K. Standard options available are VSM magnetometry, AC susceptibility, Hall effect, Resistivity, Thermal conductivity, and Seebeck coefficient. Additionally, two specialized options are available: the AC-specific heat option for very small samples with a mass in the order of few µg, and the resonant ultrasound spectroscopy option that is used for the determination of elastic constants and speed of sound. Measurements are usually fully automatized.

Contact: Emmanuel Kentzinger, Oleg Petracic


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