Magneto-Resistance Option

 

Product Highlights:

 

Description

The MR option is a high temperature 4-point resistance probe that can measure resistances between 1 and 10,000 Ohms, as a function of magnetic field, with a resolution better than 0.01% of the full scale. The system is fast and easy to use. Typically, samples can be loaded and measured in less than 2 minutes. Powerful measurement software provides automatic extraction of all parameters, including dR/R, and coercivity and exchange field from the free and pinned layer. The reference current is user settable between 0 and ±20 mA.

The MR probe is easy to install. It allows users to quickly reconfigure their VSM for this measurement. The MR probe is attached to the vibrator just like the regular ADE Magnetics sample holders. Changing the system from VSM to MR measurements is as simple as changing a VSM sample.

The MR probe is designed to fit into the ADE Magnetics cryostat, and it will operate at temperatures from 100 K to 700 K. Custom designed high-temperature contacts are used to ensure good electrical contact. To further improve electrical contact, the signal processor can exert a "punch through" action. This is done without damaging MR devices.

The MR measurement software is easy to understand. It allows the user to create recipes that can be saved and retrieved. A number of preparation steps (like anneal steps for fixed or multiple durations and temperatures) can be executed automatically. There are no difficult adjustments since the MR signal processor is fully auto-ranging. Data can be saved and retrieved later for viewing, manipulation and printing.

The MR package consists of a probe, an MR signal processor unit, a data-acquisition card and software. The MR software runs on an IBM-based system controller for the ADE Magnetics division Vibrating Sample Magnetometer, which is not included. Users with older style system controllers can upgrade their controller to be compatible with the MR measurement option.