[Top] Introduction

Introduction

Options

Features

Specifications

Control Software

"B" and "C" Series Pickups

Magnetostriction Pickups

The MESA is the only hysteresis loop tracer on the market that can make measurements in the frequency range of 10 Hz and below. Competing units operate with more-easily generated 60 Hz drive fields, and can have errors of as much as 30% in coercivity (Hc) measurements.

This latest generation instrument is fully computer controlled and capable of displaying and measuring hysteresis (BH) loops, magnetoresistance (MR/GMR), and magnetostriction.

All instruments are equipped with a "pattern memory" feature, to digitally cancel ambient magnetic fields and allow for operation at extremely high sensitivities, even in relatively noisy magnetic environments. When equipped with the Digital Signal Processing option, any remaining noise can be dramatically reduced by digital filtering algorithms.

There are many technical advantages of purchasing an Shb Instruments magnetic measurement system over the competition.

[Top] Options
The MESA is the only instrument of its type designed to make measurements in the frequency range of 10 Hz and below, avoiding the substantial measurements inherent in higher frequency operation.

The MESA is controlled by a PC running Microsoft Windows XP, and uses internal DSP processors for high-speed waveform generation, digitization and processing. All instruments are equipped with a "pattern memory" feature to digitally cancel ambient magnetic fields and allow for operation at extremely high sensitivities, even in relatively noisy magnetic environments. When equipped with the Digital Signal Processing option, any remaining noise can be dramatically reduced by sophisticated digital filtering algorithms.

Pickup assembly size, drive coil diameter, Digital Signal Processing, and GEM/SECS support.

[Top] MESA: Features

• Real time measurements
• No need to cut wafers
• High sensitivity
• Excellent repeatability
• Advanced DSP signal processing
• Optional autoloader
• Accommodates wide range of sample sizes and thicknesses
• Magnetoresistance (MR/GMR)
• Manetostriction
• Measurements
  • Br
  • Bs
  • R
  • ΔR
  • Hc
  • He
  • Hk
  • Magnetostriction
  • Dispersion
  • Skew
• Low-frequency sinewave sweeps (0.05 to 10 Hz)
• 0.01 to 1000 Oe/division horizontal sensitivity range
• 0.01 to 10,000 nW/division vertical sensitivity range
• Digital background subtraction to cancel ambient fields
• Earth's field cancellation
• Two-axis drive coils
• Optional dual sets of drive coils
• Cursor for detailed waveform measurements
• shbWin control software provides flexible and friendly instrument operation
• Supports Microsoft Active-X object model for user porgram control of all instrument functions and measurements
• Digitize multiple hysteresis loops; display on PC and save to disk
• Remote instrument operation and troubleshooting via modem or network
• GEM/SECS support available

[Top] MESA Specifications

[Top] shbWin Control Software
The new shbWin control software for the MESA brings a new level of flexibility and functionality to instrument operation.

Password protected operating modes Operator Engineer Maintenance Factory Microsoft ActiveX support allows user programming in Visual Basic, C++ or Java AutoTest for point and click measurement selection Real-time on-screen waveform display Remote diagnosis AutoTrim makes all instrument adjustments with one menu selection GEM/SECS option

[Top] Standard Pickup Assemblies for MESA
The new "B" and "C" Series pickup assemblies for the MESA offer outstanding measurement stability and repeatability. The patented shb TripleBobbin design offers more than an order of magnitude improvement in performance compared to the original Model 109A pickups.

Patented internal geometry and material improve balance stability Includes R and dR/R probing Improved immunity to external magnetic fields Increased sensitivity Improved mechanical stability and immunity to external stresses Extraordinary thermal stability allows for accurate measurements of very thin films at high drive fields. 16B for up to 25 mm (1") diameter samples 36B for up to 75 mm (3") diameter samples 66C for up to 150 mm (6") diameter samples 86C for up to 200 mm (8") diameter samples 126C for up to 300mm (12”) samples

[Top] Magnetostriction Pickup Assemblies for MESA
These specialized pickups are used to measure the magnetostrictive effect in samples on thin substrates. The sample is bent using a set of three equally-spaced ceramic knife edges, and the change in Hk is then measured.

Model 34 for wafers up to 75 mm (3 inches) in diameter Model 64 for wafers up to 150 mm (6 inches) in diameter Model 84 for wafers up to 200 mm (8 inches) in diameter Model 124 for wafers up to 300mm (12 inches) in diameter Resolution to one part in 108 Specialized software to optimize measurements Force on sample controlled by position of calibrated weights Substrate thicknesses to 0.35 mm (0.014 inches).