Les nouveautés chez Lake Shore

Available Q1 2019

The MeasureReady M91 FastHall™ controller is a revolutionary, all-in-one instrument that delivers significantly higher levels of precision, speed, and convenience to researchers involved in the study of electronic materials.
Featuring Lake Shore’s patented* new FastHall measurement technique, the M91 fundamentally changes the way the Hall effect is generated and measured by eliminating the need to switch the polarity of the applied magnetic field during the measurement. This breakthrough results in faster and more accurate measurements, especially when using high field superconducting magnets or when measuring very low mobility materials.
*Protected by US patent number 9797965. Other patents pending.
Features
Hall analysis including calculation of derived parameters for van der Pauw and Hall bar samples
FastHall technology eliminates the need for magnetic field reversal when measuring van der Pauw samples
Traditional DC field Hall measurement (field reversal required)
AC field Hall measurement
Manual step-by-step operation for full parameter control
Automatic optimization of excitation values and measurement range
Extends mobility range down to 0.001 cm2/V s, without using AC field techniques
High resistance option enables measurement of samples >10 MΩ, up to 200 GΩ
Derived parameter calculations with propagated errors
Operation over simple SCPI command interface or in conjunction with MeasureLINK-MCS software
Digital and analog I/O for simplifying integration and data gating
3-year standard warranty
   

 

Measurement applications
Hall voltage
Resistance/resistivity (four-contact in-line probe and van der Pauw)
Magnetoresistance
Hall coefficient
Hall mobility
Anomalous Hall effect (AHE)
Carrier type/concentration/density

 

https://www.lakeshore.com/products/MeasureReady/M91-FastHall-controller/Pages/Overview.aspx


Lake Shore Cryotronics is pleased to announce that the company’s MeasureReady™ 155 precision I/V source has been selected as a finalist for this year’s R&D 100 Awards.

The R&D 100 Awards honor the latest and best innovations, identifying the top technology products of the past year. Finalists were selected by an independent panel of more than 50 judges representing R&D leaders in a variety of fields. Winners will be announced at an awards dinner to be held Nov. 16 in Orlando, Florida.

The MeasureReady™ 155, named a finalist in the Analytical/Test category, is an ultra-low-noise, simple-to-use AC/DC current and voltage source suitable for a wide range of material and scientific research applications. When characterizing materials, the cleaner the excitation signal, the better the end measurements. The 155 provides the precise, very low-noise output needed for such measurements, in part because it employs the same proven noise-rejection technology used in Lake Shore’s industry-leading cryogenic thermometry products.

The source generates just 200 nV RMS (1 µV p-p) of low-frequency noise and 7 µV RMS of higher-frequency noise in the 10 mV DC range—all without the need to add any external filters. It also provides DC-low noise performance without compromising AC bandwidth.

Additionally, the 155 source features an in-phase AC reference output, which provides a convenient way to sync up with a lock-in amplifier to detect extremely low signal levels in the presence of other noise sources, a scenario common for semiconductor device measurements.

“I am proud to see the 155 named an R&D 100 Finalist. A lot of work went into building an instrument capable of achieving exceptional output performance in both DC and AC modes,” said Scott Yano, Lake Shore VP of Product Development. “Also, while doing this, our engineers made it uncommonly straightforward to operate. We know from talking to users that a lot of buttons can be intimidating. We eliminated those buttons, employing a touchscreen interface with icons and menus that follow smartphone technology standards, so changing settings is simple and intuitive—exactly as it should be.”

Wi-Fi, USB, and LAN connectivity provide convenient integration with systems using LabVIEW™, IVI.NET, and other software. Also included: a unique mobile app, which allows users to operate the 155 source remotely, whether in the same room or farther away.

For more information, visit www.lakeshore.com/155.

More science, less time

Advanced measurement performance

The 8600 Series VSM raises the bar for magnetometer performance and convenience. These VSMs combine high sensitivity (15 nemu), rapid measurement speed (10 ms/pt), and simple operation for more accurate measurements, faster.

Convenient operation

The entire 8600 Series system has been reimagined with a focus on clean, ergonomic design that simplifies the researcher’s interaction with the system. A motorized head brings the sample to a comfortable height for easy, one-handed exchange of the QuickLIGN™ sample rods. Temperature options include a cryostat, high-temperature oven, and single stage variable temperature insert. The combined temperature range of the options is 4.2 K to 1273 K. All three GlideLOCK™ options quickly slide into place and are auto-detected, with the software automatically displaying controls for the specific option. The magnet poles are also easily adjusted with the ExactGAP™ indexed positioning system that allows the pole gap to be set at one of six repeatable positions, eliminating the need to recalibrate after each change.

Designed for FORC

This VSM was created with first order reversal curve (FORC) measurement as a primary objective. FORC analysis is greatly enhanced by the high sensitivity of the 8600 Series VSM. FORC also benefits from increased data point density, and the new VSM flies through complex FORC data collection sequences in a fraction of the time required on previous systems.

Download our FREE FORC measurements ebook

Flexible and adaptable

The system’s software simplifies control of the VSM. Standard predefined measurement routines are combined with configurable field and measurement loops to provide a flexible data acquisition environment. In addition, the software features an integrated scripting tool, which enables the user to extend the existing routines with an open-ended software scripting language that can be used to perform customized measurement protocols and interface with third-party lab equipment.

Les nouveautés chez JANIS

Cryocooler System with Recirculating Helium Gas

Cryocooler System with Recirculating Helium Gas Cools Continuous Transfer Type Cryostats

The ongoing global helium shortage continues to adversely affect researchers, many of whom are unable to use
these their existing continuous transfer cryostats to perform research due to high operating costs or limited LHe availability.
Janis Research is now offering a solution to help researchers that have limited operating budgets but that can gain access
to capital equipment funding.
Janis Research has developed a series of cryogen free, low vibration, closed cycled cryocooler systems that use
recirculating helium gas as a direct replacement for liquid helium, to cool continuous flow cryostats without
the use of LHe. Pulse tube-cooled (PT) and Gifford-McMahon (G-M) cryocooler options are available, in various capacities
and base temperature configurations. Helium gas passes through a series of heat exchangers on the cryocooler, and then
flows through the integrated vacuum insulated transfer line into the cryostat. After cooling the sample, the gas is then returned to
the cryocooler for re-cooling and continued circulation.

These recirculating gas cryocooler systems are available for use with almost any existing continuous transfer type cryostats,
such as the Janis SuperTran series. The Model PT-7 pulse tube-cooled system shown below operates continuously with a
base temperature of less than 7 K (with options for lower temperatures). The interchangeable system transfer line tips make
the cryogen free cryostat universal for all Janis SuperTran cryostats including Models ST-100, ST-300, ST-400 and ST-500.
The microscopy cryostat system as shown can, with proper mounting, maintain the vibration level on the cryostat body
at less than 20 nm.

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