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Accessories
Model 74033 autorotation
The rotation option allows you to automatically vary the sample orientation relative to the direction of the applied magnetic field. The angle of rotation is within a single plane defined by the direction of applied magnetic field, referred to as the x-axis. Angular variation is about the z-axis. Rotation is programmable to a resolution of <1° for rotating the sample from -10 to 730° and all parameters are measured as a function of rotation angle.
Model 74032 vector coils
The vector option extends the VSM measurement capabilities to facilitate investigations of anisotropic magnetic materials, allowing you to determine their vector magnetization components and susceptibility tensor. When used in combination with the Model 74033 autorotation option, the vector coils provide information that is essentially identical to that provided by a dedicated torque magnetometer. The Model 74032 2-inch vector coils are compatible with all variable temperature options.
E2M 2-stage rotary vacuum pump
Capable of achieving a pressure below 0.67 Pa (5 × 10-3 torr) at 1 m3 per hour, the 2-stage rotary vacuum pump is used for evacuating both the oven and cryostat vacuum spaces of our variable temperature options. This, or a similar vacuum pump, is required for daily operation of variable temperature options.
TPS-FRG turbomolecular vacuum pump station
Used to annually evacuate the cryogen transfer line of the optional cryostat and single stage variable temperature assembly (transfer line and kit are included with these options), the Model TPS-FRG provides vacuum to 1.33 × 10-3 Pa (10-6 torr). In addition to annual cryogen transfer line maintenance, the turbomolecular vacuum pump can also be used in place of the E2M rotary vacuum pump for evacuating the cryostat vacuum space.
Recirculating chillers
Lake Shore offers NesLab® recirculating chillers in order to provide a complete laboratory solution. The NesLab chillers feature a CFC-free refrigeration system.
The refrigeration system utilizes a hermetically sealed compressor and hot gas bypass system of temperature control. This system eliminates on/off cycling and premature wear of the compressor. Strong pumps provide continuous flow even through cooling lines with small IDs.
system Application Software
Model 74039 Helmholtz coil
for measurements at fields less than 100 Oe.
when measuring very low moment samples, distortion from the iron in traditional electromagnets is not a concern.
power supply, cables, connectors, and related accessories to allow you to swap between the Helmholtz coil and your electromagnet
The fully integrated IDEAS VSM software uses an intuitive Windows® interface for system operation, data acquisition, and analysis.
Select a default experiment profile or customize your own profile to run a virtually unlimited number of experiments.
Set up and execute measurement routines and experiments quickly and easily
Substrate corrections and backgrounds can be easily subtracted from measurement data. Calculate and display derivative curves, automatically remove offsets, and determine measurement results.
Display real-time feedback of processed data in both tabular and graphical form in CGS or SI units.
Set up a field experiment in either continuous or point-by-point mode.
Define Sample Parameters
Define sample parameters before or after recording data.
Ramp Generator
Generate a ramp profile based on field, temperature, or angle setup that is optimized to your material and application
temperature vs. Moment
Define, save, and edit individual experiments as well as versatile profiles. Profiles allow you to automate sequences of multiple experiments along with other parameters, such as start date and time, and field and temperature ramps
All system parameters and functions are controlled for unattended operation and any number of parameters can be automatically extracted from hysteresis loop data.
Real-time field-dependent response tracks field changes for accurate curve shape definitions and parameter extraction.
The MR probe option performs fast and accurate measurements of MR, GMR spin-valve, CMR and other magnetoresistive materials as a function of both in-plane magnetic field and temperature. This measurement option includes data acquisition, control, and analysis software to automatically extract pertinent parameters for the device under test.
interchangeable with the VSM sample rod for compatibility with variable temperature and autorotation options. The temperature range of use extends from 20 K to 450 K cryostat, 325 K to 673 K with oven Angular dependent MR measurements are possible when used in combination with the 74033 autorotation option.
Conclusion
VSM systems are the most sensitive electromagnet-based VSMs commercially available and feature the broadest temperature range capability-4.2 K to 1,273 K (-269 °( to 1000 °C).
These systems measure a wide range of sample types, making them ideal tools for the most demanding materials research applications and quality control of magnetic materials
An assortment of options, including low temperature cryostats,a high temperature oven, a single stage variable temperature assembly,vector coils, autorotation,an MR probe,and a Helmholtz coil expand the functionality of Lake Shore VSM systems
VSM is a workhorse with high sensitivity and rapid measurements that meet our demanding needs
Lake Shore VSMs have proven themselves to be very reliable based on this very demanding environment
“The sensitivity of the Lake Shore VSM is as good as specified. We were able to measure ultrathin Co films of 4 Å with the area of ~10 mm2. We can measure magnetization down to 8 K with high sensitivity. It replaces our need for SQUID magnetometer for many of our projects
New materials push the limits of electromagnet-based VSM systems, combines high sensitivity,precision electronics, flexible software,and variable magnetic field and temperature into the most advanced electromagnet based VSM.
Vibrating sample magnetometers (VSM) are used to characterize the DC magnetic properties of materials as a function of magnetic field, temperature, and time available in three different variable gap electromagnet configurations providing fields up to 3.1T,
what do you really need from a VSM ???
a flexible software and a robust design. We also needed to be certain of good back up, for answers to our queries, spare parts and repairs
run continuously (24 hours a day, 7 days a week)
The high level of technical support and service provided exemplifies our commitment to the research community and industry.
A quick to send someone out for the installation and training. It has always been easy to get in touch with the technical representative whenever had a question.
No problem with the power supply, electromagnet, computer, and software. The software and control program seems very logical and is easy to interact with.