SQUID Magnetometer
Quantum Design MPMS®3
Quantum Design's MPMS 3 represents the culmination of 40 years of development and design in the world of SQUID Magnetometry. Providing users with the sensitivity of a SQUID (Superconducting QUantum Interference Device) magnetometer and the choice of multiple measurement modes, the MPMS 3 offers new levels of performance in magnetic research while including those aspects of past Quantum Design SQUID magnetometers that customers have grown to appreciate and depend on.
The MPMS 3 incorporates major advances in data acquisition, temperature control and magnetic field control with ≤10-8 emu sensitivity. The award- winning design of Quantum Design's MPMS 3 also provides expanded software functionality within its user-friendly MultiVu interface. Combining the highest level of system performance with the possibility of using all previously available MPMS measurement options, the Quantum Design MPMS 3 truly represents the next generation of advanced SQUID magnetometry.
Features
- SQUID Sensitivity
- 7 Tesla Magnet with QuickSwitch™ technology
- Maximum ramp rate: 700 Oe/sec
- Temperature Range: 1.8 – 400 K with Rapid Temp™
- 300 to 1.8 K in 25 min. (typical)
- Multiple measurement modes (DC, VSM and AC Susceptibility)
- Software controls for the temperature and magnetic field readily enable the automation of complex data acquisition procedures
- Cryogen Free with EverCool®
DC Measurement Modes
SQUID-VSM
- < 1 x 10-8 emu (≤ 2,500 Oe), < 8 x 10-8 emu (> 2,500 Oe)
- 0.1 to 8 mm variable oscillation amplitude enables a large dynamic range
- > 100 emu maximum moment
- Rapid data acquisition
Traditional DC Scan
- < 5 x 10-8 emu (≤ 2,500 Oe), < 6 x 10-7 emu (> 2,500 Oe)
- 10x faster data acquisition as compared to MPMS-XL
- Ideal for measurements using the Horizontal Rotator, FOSH, Pressure Cell, and Helium-3 Refrigerator
- 2 emu maximum moment
Available Measurement Options
AC Susceptibility
The AC Susceptibility option allows the experimenter to measure the dynamic (real and imaginary) response of a wide variety of samples including, but not limited to, superconductors, nanoparticles, and spin glasses.
- AC Frequency Range: 0.1-1000 Hz
- AC Field Amplitude: 0.1-10 Oe
- Can be used in conjunction with any sample holder
Ultra-Low Field (ULF)
The ULF option uses a custom fluxgate field sensor in conjunction with in-situ concentric modulation and trim coils to actively cancel the residual magnetic field in the superconducting solenoid. The option also allows the experimenter to set fields up to +/- 25 Oe.
- Field uniformity: +/- 0.05 Oe
- Field nulling window: +/- 10 mm
- Can be used in conjunction with any measurement mode or sample holder
Helium-3 Refrigerator
The iQuantum Helium-3 refrigerator extends the minimum temperature for DC and AC moment measurements below 0.5 K.
- Continuous operation down to 0.5 K
- < 3 hour cooldown time, 10 hours of 3He lifetime
- Compatible with DC Scan and AC Susceptibility measurements
Oven
The Oven option allows for magnetometry spanning temperatures of 315 – 1000 K. A special alumina sample holder with an integrated resistive heater and temperature sensor locally heat and sense the sample temperature.
- User kit comes standard with high temperature Zircar cement and copper radiation shields for sample mounting
- Moment Sensitivity 1·10-6 emu for H≤2500 Oe and 8·10-6 emu for H>2500 Oe
- Compatible with traditional DC Scan, SQUID-VSM, AC Susceptibility (<10 Hz), ULF
AC Resistance (ETO)
The Electrical Transport Option (ETO) enables AC resistance measurements of samples using a 4-wire configuration. For samples with higher resistances, a 2-wire high impedance mode is also available. Signals from two channels can be collected simultaneously. An additional voltage pass through allows for voltage-controlled magnetism studies.
- Measure resistances up to 5 MΩ in standard 4-wire mode
- Resistances of 2 MΩ – 1 GΩ can be measured in the high-impedance 2-wire mode
- Automated I-V curve collection can be used to screen for ohmic contacts
- Differential (dV/dI) resistance measurement mode
- Compatible with traditional DC Scan, SQUID-VSM, AC Susceptibility (<10 Hz), ULF
Rotator
The Rotator enables the magnetometry as a function of angle, spanning more than 360°. A specially designed sample rod and stepper motor allow for automated integration into MultiVu. Two rotor geometries allow for a variety of sample mounting possibilities to fully characterize anisotropic samples.
- Range: More than 500°
- Step Size: 0.1° (typical)
- Compatible with traditional DC Scan and ULF
Fiber Optic Sample Holder (FOSH)
The Fiber Optic Sample Holder (FOSH) enables light to be delivered to the sample space during a measurement.
- Specialized sample rod and holder transmits a wide spectrum of light
- Standardized fiber connection ensures compatibility with a variety of light sources
- Compatible with traditional DC Scan, AC Susceptibility, ULF
Light Sources
For experiments requiring illumination inside the MPMS 3 sample space, two broadband xenon light sources are available:
- The TLX120Xe utilizes a 100 W source and integrates a motorized monochromator such that the light wavelength can be selected using a sequence command in MultiVu
- The MLS 300 W source includes a manual selection filter wheel for passing pre-determined wavelengths of light
Pressure Cell
The pressure cell option for magnetometry is manufactured by HMD, a leading Japanese supplier of pressure cells. A simplified design requires neither copper sealing rings or a hydraulic press to achieve the maximum available pressure of 1.3 GPa.
- Included manometer materials: tin (Sn) and lead (Pb)
- BeCu construction affords a minimal, uniform magnetic background
- Compatible with traditional DC Scan, AC Susceptibility (<10 Hz), ULF
Videos
MPMS 3 Webinar
