Magnetic Properties Measurement System (MPMS-XL)
Specifications:
- Temperature range: 2.1K - 400K
- DC Magnetic Field: 0 T - 5 T (ultra-low field allows remanence to be measured)
- AC Magnetic Field: 0 - 0.3 mT, <1 - 1,000 Hz
- Dynamic Range: 10-10 to 10-3 Am2
A more detailed description can be found in IRM Quarterly v. 8, n. 4, Winter 1998-99, while a description of measurement types and data can be found in IRM Quarterly v. 23, n. 3, Fall 2013.
Measurement Types:
The MPMS is used primarily for magnetic mineral identification based on low-temperature crystallographic transitions (e.g., the Verwey transition in magnetite at about 120 K), and for characterizing particle size distributions, especially for samples containing ultrafine-grained superparamagnetic grains.
Typically used to measure:
- Field cooled & Zero-field cooled (FC-ZFC) curves in zero-field (although can be run in a small bias field).
- Room-Temperature Saturation Isothermal Remanent Magnetization (RT-SIRM) curves.
- Frequency dependence of magnetic susceptibility with varying temperature.
- Field dependence of susceptibility with varying temperature.
Sample Preparation
For information on sample preparation, see IRM Quarterly v. 6, No. 4, Winter 1996-97.
Compare with
Quantum Design MPMS-3
Recently installed in 2021, the MPMS-3 has some functional differences to the MPMS-XL:
- VSM mode (greater moment measurement range).
- Higher maximum field to 7 T.
- Faster temperature ramping.
- Faster field ramping.
- Oven module to 1000 K.
Owing to differences in the magnetic designs between the two systems, the MPMS-XL is preferred when precise measurements in zero-field are required.
