ASHMAR SCIENTIFIC SHB Model 110 High-Field Magnetic Measurement System
| Brand | ASHMAR SCIENTIFIC |
|---|---|
| Origin | USA |
| Manufacturer Type | Authorized Distributor |
| Origin Category | Imported |
| Model | MODEL 110 |
| Pricing | Available Upon Request |
Overview
The ASHMAR SCIENTIFIC SHB Model 110 High-Field Magnetic Measurement System is a computer-controlled, high-sensitivity magnetometer engineered for precision characterization of permanent magnetic materials and thin-film magnetic structures. Based on the principle of inductive detection with symmetric pickup coil architecture and closed-loop field feedback control, the system measures magnetic hysteresis loops (M–H), magnetoresistance (MR), and magnetostriction in real time under applied DC and quasi-static fields up to 15 kOe. Its design integrates a water-cooled superconducting-grade solenoid driver, high-stability current sources, and embedded digital signal processing (DSP) for noise suppression and waveform fidelity. Unlike conventional vibrating sample magnetometers (VSMs) or extraction magnetometers, the Model 110 employs a non-contact, stationary-sample configuration—enabling measurements on full wafers (up to 200 mm / 8-inch diameter) without cleaving or patterning. This architecture supports traceable, reproducible data acquisition under ambient laboratory conditions, even in environments with moderate external magnetic interference.
Key Features
- Maximum applied field: 15,000 Oe (1.5 T) with field uniformity better than ±0.5% over 25 mm diameter spherical volume
- Sample compatibility: Full 200 mm wafers, bulk magnets, sintered compacts, and thin-film substrates (down to 5 nm thickness)
- Symmetric dual-pickup coil design with active environmental field cancellation—enables sub-10−6 emu sensitivity at high drive fields
- Fully integrated DSP-based signal chain: delta-sigma analog-to-digital conversion, real-time digital filtering (FIR/IIR), and harmonic rejection
- Computer-controlled operation via SHBWin software suite running on Windows-based Pentium-class PC with USB/Ethernet interface
- Onboard waveform generation and digitization at up to 1 MS/s sampling rate; synchronized field sweep and response capture
- Digital background field nulling algorithm eliminates residual Earth-field and lab-field contributions without magnetic shielding
- Water-cooled solenoid driver with thermal monitoring and interlock protection for extended high-power operation
Sample Compatibility & Compliance
The Model 110 accommodates standard magnetic material forms including NdFeB, SmCo, AlNiCo, ferrites, and soft magnetic alloys in disc, rod, or wafer format. It supports ISO 5753-1 (permanent magnet materials), ASTM A977/A977M (magnetic properties of permanent magnets), and IEC 60404-5 (methods of measurement of magnetic properties of permanent magnet materials). For thin-film MR characterization, it aligns with procedures referenced in IEEE Std 1620 (guidelines for magnetoresistive sensor testing). All data logging includes timestamped metadata, operator ID, instrument calibration status, and environmental temperature—supporting GLP-compliant documentation and FDA 21 CFR Part 11 audit trails when deployed with validated SHBWin configurations.
Software & Data Management
SHBWin is a modular, Windows-native application providing intuitive instrument control, real-time visualization, and post-acquisition analysis. Key modules include Hysteresis Loop Builder, MR Curve Fitting Engine, Magnetostriction Derivative Calculator, and Batch Export Manager. Raw waveforms are stored in HDF5 format with embedded calibration coefficients and unit definitions per NIH/NIST conventions. The software supports automated report generation (PDF/CSV/XLSX), cross-experiment comparison, and user-defined pass/fail criteria based on coercivity (Hc), remanence (Mr), energy product ((BH)max), and loop squareness. “Mode Memory” functionality allows saving and recalling complete measurement configurations—including field ramp rates, dwell times, filter settings, and trigger thresholds—for rapid method transfer across users and shifts.
Applications
- Quality control of sintered and bonded permanent magnets in automotive and aerospace supply chains
- R&D of exchange-biased spin valves and synthetic antiferromagnets for MRAM development
- Process validation of ion-beam-assisted deposition (IBAD) and pulsed laser deposition (PLD) magnetic thin films
- Temperature-dependent hysteresis mapping (via optional cryogenic or heating stage integration)
- Calibration reference for secondary standards laboratories requiring NIST-traceable M–H data
- Teaching labs requiring robust, low-maintenance instrumentation for undergraduate solid-state magnetism experiments
FAQ
What sample geometries can be measured without cutting or mounting?
Full 200 mm (8-inch) wafers, discs up to 200 mm diameter and 50 mm thickness, and rectangular bars up to 150 × 50 × 50 mm.
Does the system require magnetic shielding or special facility infrastructure?
No. Digital background field cancellation enables operation in standard lab environments; only standard 208–240 VAC, 30 A, single-phase power and deionized cooling water (15–25°C, 4 L/min) are required.
How is calibration traceability maintained?
Each system ships with a NIST-traceable calibration certificate for field strength (Oe/T) and moment sensitivity (emu), verified annually using certified reference magnets and fluxgate standards.
Can SHBWin export data compatible with MATLAB or Python analysis workflows?
Yes—native HDF5 output includes standardized metadata schema (CF-1.8 compliant); Python libraries (h5py, pandas) and MATLAB’s h5read() support direct ingestion.
Is remote operation and monitoring supported?
Yes, via secure RDP or SSH tunneling to the host PC; SHBWin also supports OPC UA server mode for integration into factory MES/SCADA systems.
