Applied Analysis Platform Modules


AAP-ETPT, Applied Analysis Platform-Electrical Transport Module

The AAP-ETPT Module is interchangeable with the standard C-Mag sample rod and allows for the collection of Resistivity, Hall Effect and AC/DC Transport measurements.  The module features a sample mount (puck) design which is affixed to a carrier allowing for 12 each Mill-Max pin connections for sample wiring.  The experimental assembly includes a polished isothermal sample shield, threaded to the sample mount and an Inner Vacuum Chamber with a conical seal which allows for operation in exchange gas or vacuum mode.

  • 25mm OD sample mount (Puck) with 12 wire sample interconnections
  • Sample puck design: Users choice, Flat phenolic sample mounting surface or Window style with 0.45 x 0.55 cutout of the phenolic allowing for direct mount to the cold stage.  Additional sample mounts are available and all are interchangeable with the puck base.
  • Puck Base with Mill-Max pin connections for sample wiring, fitted with calibrated Cernox temperature sensor and bifilar wound heater.
  • Gold plating on all subassemblies
  • Operating temperature: <1.8K to 425K depending on sample environment.

Specification:

2 and 4 wire configuration for Resistivity, Hall Effect and AC/DC Transport measurements dV/dI vs I or dV/dI vs V).

Dual instruments are provided to allow for independent measurements on two separate channels.

DC Performance:

  • Voltage Range: 1nV to 200V
  • Current Range: 50pA to 1.00A
  • 20w Maximum

AC Performance:

  • Voltage Range: 2nV to 1V
  • Current Range: 1pA to 150mA
  • Frequency: 1mHz to 100KHz
  • Noise: 1nV/√Hz@1kHz (Typ)
  • Sensitivity: ±10nΩ RMS (Typ)
  • Phase Resolution: 0.01o

Hall Effect:

  • 4 or 5 Wire configuration
  • Multiple samples compatible

Transport:

  • 4-Wire resistance up to 10MΩ
  • 2-Wire resistance up to 5GΩ

Instrumentation:

  • 2 each Keithley or equivalent AC/DC Current Source
  • 2 each Keithley or equivalent NanoVoltmeter

AAP-ACS, Applied Analysis Platform-AC Susceptibility Module:

The C-Mag AC Susceptibility (AAP-ACS) Modules consists of a specialised sample probe which may be interchanged with any of the various analytical modules available for the C-Mag platform.  Major components of the AAP-ACS Module include specialised sample rod with exchangeable tips and integral pickup coils. An industry standard Lock-in Amplifier and Function Generator are provided.

Note: AAP-ACS and AAP-VSM modules both share the same coils.

Specifications:

  • Sensitivity: 10-7 emu.
  • DC Sensitivity: 10-6 emu.
  • Frequency Range: <10Hz to >10KHz.
  • Phase Resolution: 0.5 deg.
  • Stability: ±1% for T<50K, ±0.5% for T>50K, or better.
  • Accuracy: ±0.5% over the entire temperature and field range.

AAP-VSM, Applied Analysis Platform-VSM Module:

The C-Mag Vibrating Sample Magnetometer (AAP-VSM) Module consists of a specialised sample probe which may be interchanged with any of the various analytical modules available for the C-Mag platform.  Major components of the AAP-VSM Module include a linear drive unit and encoder, sample rod with exchangeable tips, integral pickup coils and sample heater.  An industry standard Lock-in Amplifier is used to measure the induced voltage from the pickup coils.  Incorporating the AAP-VSM Module into the C-Mag Platform allows for controlled sweeping of the magnetic field as well as temperature, frequency, amplitude and stroke.

Specifications:

  • Sensitivity: 10-6 emu.
  • Temperature Range: <4K – >300K
  • Maximum Frequency: 40Hz (20 Hz typical)
  • Amplitude:  10mm (+ 5mm)

Frequency and amplitude are inversely proportional.

  • Max sample mass 10 grammes
  • Accuracy 0.5%

Cryomagnetics Navigator Software Control System with Computer:

  • Navigator is a software package that allows complete automation of the superconducting magnet system control electronics.
  • Automated analysis package for all quoted Applied Analysis Platform Modules, ETPT, ACS and VSM measurements at varied temperatures and magnetics field LabVIEW Based.