MPMS®3 High-Sensitivity SQUID Magnetometer

Quantum Design’s MPMS 3results from four decadesof design and manufacture in Superconducting Quantum Interference Device (SQUID) magnetometry.

The MPMS 3 provides users with the sensitivity of a SQUID magnetometer and the option of multiple measurement modes, offering new levels of performance in magnetic research while retaining the features of previous Quantum Design SQUID magnetometers that customers have grown to appreciate and rely on.

It includes significantadvancements in temperature management, data acquisition, and magnetic field control, with a ≤10^-8 emu sensitivity. The MPMS 3'saward-winning designhas additional software functionality insideits easy-to-useMultiVu interface.

Unitingthe maximum degree of system performance with the ability to utilizeall previously available MPMS measurement methods, the Quantum Design MPMS 3 isthe futureof advanced SQUID magnetometry.

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Features

Multiple measurement modes (DC, VSM, and AC Susceptibility)

Software controls for temperature and magnetic field to automate complex data acquisition operations

Cryogen Free with EverCool^®

SQUID Sensitivity

7 Tesla Magnet with QuickSwitch^TMtechnology

Maximum ramp rate: 700 Oe/sec

Temperature Range: 1.8 – 400 K with Rapid Temp^TM

300 to 1.8 K in 25 min. (typical)

DC Measurement Modes

SQUID-VSM

< 1×10^-8 emu (≤ 2,500 Oe), < 8×10^-8 emu (> 2,500 Oe)

0.1 to 8 mm variable oscillation amplitude allows for a vast dynamic range

> 100 emu maximum moment

Fast data acquisition

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Traditional DC Scan

< 5×10^-8 emu (≤ 2,500 Oe), < 6×10^-7 emu (> 2,500 Oe)

10× faster data acquisition as compared to MPMS-XL

Perfect for measurements with the Helium-3 Refrigerator, FOSH, Horizontal Rotator, and Pressure Cell

2 emu maximum moment

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Available Measurement Options

AC Susceptibility

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The AC Susceptibility option enables the experimenter to determine the dynamic (real and imaginary) response of a wide range of samples, including nanoparticles, spin glasses, and superconductors.

AC Frequency Range: 0.1-1000 Hz

AC Field Amplitude: 0.1-10 Oe

Use with sample holder

Ultra-Low Field (ULF)

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The ULF option actively cancels the remaining magnetic field in the superconducting solenoid by utilizing a bespoke fluxgate field sensor, in-situ concentric modulation, and trim coils. It also allows the experimenter to set fields to +/- 25 Oe.

Field uniformity: +/- 0.05 Oe

Field nulling window: +/- 10 mm

Can be utilized with any sample holder or measurement mode

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Sub-Kelvin Capabilities

Helium-3 Refrigerator

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The iQuantum Helium-3 refrigerator lowers the minimum temperature for DC and AC moment measurements to below 0.5 K.

Continuous operation down to 0.5K

< 3 hour cooldown time, 10 hours of ³He lifetime

Suitable for DC Scan and AC Susceptibility measurements

High Temperature Oven

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The Oven option supports magnetometry at temperatures ranging from 315 to 1000 K. The sample temperature is locally heated and sensed using a unique alumina sample holder with an integrated resistive heater and temperature sensor.

High-temperature Zircar cement and copper radiation shields for sample mounting are included in the user kit as standard equipment

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

Electrical Transport

AC Resistance (ETO)

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The Electrical Transport Option (ETO) allows for AC resistance measurements on samples utilizing a 4-wire arrangement; for samples with higher resistances, a 2-wire high-impedance mode is available. Signals from two channels can be gathered simultaneously. An additional voltage pass-through enables voltage-controlled magnetism research.

Measure resistances up to 5 MΩ in standard 4-wire mode

The high-impedance 2-wire mode allows for the measurement of resistances between 2 MΩ and 1 GΩ

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

Sample Rotation

Rotator

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The Rotator provides magnetometry as a function of angle, covering more than 360 °. A newly constructed sample rod and stepper motor enable automated integration with MultiVu. Two-rotor geometries provide many sample mounting options for fully characterizing anisotropic materials.

Range: More than 500 °

Step Size: 0.1 ° (typical)

Compatible with traditional DC Scan and ULF

Photomagnetism

Fiber Optic Sample Holder (FOSH)

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The Fiber Optic Sample Holder (FOSH) allows light to enter the sample area during a measurement.

Specialized sample rod and holder transmit a broad range of light

A standardized fiber connection ensures compatibility with multiple light sources

Compatible with traditional DC Scan, AC Susceptibility, ULF

Light Sources

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The MPMS 3 sample space has two broadband xenon light sources accessible for experiments that need illumination:

The TLX120Xe uses a 100 W source and incorporates a motorized monochromator so that a MultiVu sequence command can be used to choose the light wavelength

To pass specific light wavelengths, the MLS 300 W source has a manual selection filter wheel

High Pressure

Pressure Cell

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HMD, a renowned Japanese pressure cell manufacturer, manufactures the magnetometry pressure cell. To reach the maximum allowable pressure of 1.3 GPa, a simplified design does not require copper sealing rings or a hydraulic press.

Materials for the manometer: lead (Pb) and tin (Sn)

BeCu structure provides a minimum, uniform magnetic backdrop

Compatible with traditional DC Scan, AC Susceptibility (<10 Hz), ULF