Radiant's Magneto-electric Bundle offers researchers a complete platform to efficiently characterize magnetic coupling of multiferroic or magnetopiezoelectric devices. Radiant's Magnetoelectric Bundle is offered in a Bulk Ceramic and Thin Film Testing Package.
The accessory adds four items to the Radiant tester:
1. ME Shield Box: The sample holder that shields the
sample electrically while also mounting magnetic field sensors
directly at the sample location. This is the only way to be sure
of the magnetic field at the sample during a test. Also, most
modern ME samples generated only a few picocoulombs of charge
which cannot be seen in a laboratory without electrical shielding
due to 50Hz or 60Hz noise.
2. Lakeshore MH-6 Helmholtz coil for applying small
magnetic fields up to 50 Oersted. - You do not have to purchase
this item if you already have your own magnetic coils or prefer
those of another manufacturer.
3. Radiant 2.5 Ampere Current Source for driving the
magnetic coil. - Again, you do not need this item should you
already have a voltage controlled current amplifier.
4. A Lakeshore Hall Effect magnetic field sensor - used
for calibrating the test fixture, especially if you provide your
own coils and current amplifiers.
Radiant does not supply DC magnetic field coils but the MER Task
in Vision will control external DC coils to set a DC magnetic
field across the sample.
The Magneto-electric Hardware/Software Bundle Includes:
Radiant Precision Current Source CS-2.5 (includes 2 voltage outputs, current sensor, 2.5-amp current source, Helmholtz Coil, Test Fixture for Bulk Ceramics
or Thin Films, and Magneto-electric Software Task
The Magnetoelectric Response (MER) Task in Vision
executes a single or double sinusoidal or triangular magnetic
field waveform across the sample inside the Shield Box inside the
Helmholtz coil while measuring the charge generated by the sample
in response to the changing magnetic field. It is the exact
parallel to the classic polarization hysteresis loop measurement
except for the replacement of the voltage waveform with a magnetic
field waveform. The DRIVE output of the tester is connected to
the voltage input of a current source which drives the magnetic
coil. In addition to the AC magnetic coil, Vision will set DC
magnetic fields in a separate, much larger coil that can be placed
across the sample.
There are a wide variety of measurements besides the magnetoelectric response that can be executed with the Magnetoelectric Bundle.
1) Polarization Hysteresis vs Magnetic Field
2) Remanent Polarization vs Magnetic Field
3) PUND vs Magnetic Field
4) Conduction vs Magnetic Field (the so-called magneto-resistive memory effect)
5) IV vs Magnetic Field
6) Small Signal Capacitance vs Magnetic Field
7) Voltage-to-Magnetic Field Task - Sets a voltage on
the input of an external current amplifier to set a DC magnetic
8) A Calibration Task
9) The MER Task - measures magnetoelectric response of
10) The Single Point C/V MR Task - measures the sample
small signal capacitance after setting a specified DC magnetic
Radiant's Magneto-electric Bundle hooks up to existing coils on the market such as GMW and other manufacturers.