Solution Science for Research and Industry

Posts tagged “hysteresis

Lake Shore’s 7400 Vibrating Sample Magnetometer is the most sensitive available today

VSM_SQLake Shore’s Vibrating Sample Magnetometer systems (VSM) can measure all types of magnetic materials in bulk, powder, thin film, single crystal, and liquid form, and the latest 7400 series Vibrating Sample Magnetometer is the most sensitive VSM available today.

This VSM features a noise floor of 1 x 10-7 emu at 10 seconds/point sampling, 4 x 10-7 emu at 1 second per point and 7.5 x 10-7 emu at 0.1 seconds per point. In addition to providing the lowest noise floor, the 7400’s patented technology leads to a stability of 0.05% per day which surpasses the stability of any other commercial VSM.

Under full software automation it can measure and record hysteresis M(H) loops, torque curves, isothermal and DC demagnetisation remanence curves, and temperature dependent magnetic properties.

Models based on variable gap 4″, 7″ and 10″ electromagnets are available, providing field strengths to above 3 T. While variable gap magnets allow for easy reconfiguration of the magnet gap to accommodate large samples of up to 1″.

For more detailed information about this product, please contact us.

New Electromagnet Power Supply from Lake Shore

Lake Shore has introduced a new electromagnet power supply – the Model 648. This quiet, fault-tolerant and robust 9.1 kW water-cooled supply is optimised for powering large research electromagnets up to 254 mm (10″) in size and is ideal for electromagnet characterisation systems used for magneto-optical studies, magnetic hysteresis tests, susceptibility measurements, Hall effect studies, spin magnetic resonance demonstrations, and biological tests.

Designed for use in high precision laboratory settings that require low electrical noise, the Model 648’s linear design removes the undesirable higher frequency noise typical of many other switch mode power supplies. The low output noise means researchers can obtain greater resolution and finer detail in results drawn from data taken during high sensitivity experiments. By using a convenient bipolar, 4-quadrant operation mode, it provides clean transitions through zero without discontinuities thus eliminating the need for external switching or operator intervention to reverse current polarity.

Built-in fault protection enables the system to survive direct shorts across the output without damage and, reassuringly, the Model 648 also comes with Lake Shore’s full 3 year standard warranty. For more information and a datasheet, please contact us.