ASHMAR SCIENTIFIC SHB Model 110 High-Field Magnetic Property Measurement System
| Brand | ASHMAR SCIENTIFIC |
|---|---|
| Origin | USA |
| Manufacturer Type | Authorized Distributor |
| Origin Category | Imported |
| Model | MODEL 110 |
| Pricing | Upon Request |
Overview
The ASHMAR SCIENTIFIC SHB Model 110 High-Field Magnetic Property 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), magnetic resistivity (MR), and magnetostriction in real time under applied DC and quasi-static fields up to 15 kOe (1.5 T). Its core architecture integrates a digitally optimized water-cooled solenoid drive coil, high-stability current source, low-noise signal conditioning electronics, and proprietary delta-sigma analog-to-digital conversion. Designed for laboratory environments where ambient magnetic noise is non-negligible, the Model 110 employs active digital compensation to null background fields—enabling sub-μemu sensitivity even without magnetic shielding rooms. The system supports full-sample-diameter measurements up to 200 mm (8 inches), making it suitable for wafer-level characterization without sample sectioning.
Key Features
- Digital field stabilization with real-time closed-loop feedback, ensuring field reproducibility better than ±0.02% over extended measurement cycles
- Symmetric dual-pickup coil design patented by SHB, minimizing eddy-current artifacts and enabling stable operation at high drive fields (>10 kOe) on sub-100 nm thin films
- Integrated water-cooled solenoid capable of generating uniform, spatially homogeneous fields up to 15 kOe with thermal drift < 0.1 Oe/min under continuous operation
- Onboard digital signal processing (DSP) engine performing real-time waveform generation, digitization at 1 MS/s, and adaptive digital filtering (FIR/IIR) to suppress 50/60 Hz interference and broadband noise
- Full PC-based control via SHBWin software with “Mode Memory” functionality—storing and recalling instrument configurations, calibration parameters, and sequence protocols
- Automatic environmental field cancellation using internal fluxgate reference sensors and real-time digital offset subtraction
Sample Compatibility & Compliance
The Model 110 accommodates bulk magnets, sintered NdFeB/SmCo specimens, bonded ferrite tiles, and epitaxial or sputtered thin-film stacks on Si, glass, or flexible substrates—without requiring cleaving or patterning. Sample holders support diameters from 3 mm to 200 mm and thicknesses up to 25 mm. All firmware and data acquisition modules comply with IEEE Std 1003.1 (POSIX) for deterministic timing behavior and are architected to meet audit requirements under GLP and GMP frameworks. Raw measurement data files include embedded metadata (timestamp, operator ID, calibration traceability, field sweep rate, temperature if interfaced with optional cryostat), supporting 21 CFR Part 11-compliant electronic records when deployed with validated SHBWin configuration.
Software & Data Management
SHBWin is a Windows-native application built on a modular C++ framework with Qt-based GUI and HDF5-backed data storage. It provides synchronized visualization of M–H loops, dM/dH derivatives, coercivity extraction (HcJ, HcB), remanence (Mr), and maximum energy product ((BH)max). Export formats include ASCII (tab-delimited), CSV, MATLAB .mat, and NIST-compatible .tdms. The software supports scripting via Python API (pySHB) for automated batch runs, DOE sequences, and integration into LabVIEW or MATLAB-based QA workflows. All data operations maintain full audit trails: user login, parameter changes, calibration events, and export actions are timestamped and logged in encrypted binary journal files.
Applications
- Quality control of sintered and bonded permanent magnets per ASTM A977/A977M (Standard Test Method for Magnetic Properties of High-Coercivity Permanent Magnet Materials)
- Development and process validation of MRAM stack layers, spin-valve structures, and exchange-biased multilayers
- Temperature-dependent hysteresis analysis (when coupled with variable-temperature insert)
- Demagnetization curve mapping for motor and generator design validation
- Inter-laboratory round-robin testing under ISO/IEC 17025-accredited conditions
- Failure analysis of magnet degradation due to thermal aging or corrosion exposure
FAQ
What is the maximum sample diameter supported without modification?
The standard configuration accepts samples up to 200 mm (8 inches) in diameter using the large-area pickup coil assembly.
Does the system require external magnetic shielding?
No—digital background field cancellation enables operation in typical lab environments (ambient field < 500 mOe); however, mu-metal shielding is recommended for sub-100 nemu resolution work.
Can the Model 110 measure magnetostriction?
Yes—via integrated strain gauge interface and synchronized displacement transducer input; requires optional SHB-MST accessory module.
Is firmware upgrade capability available remotely?
Yes—SHBWin includes secure OTA update functionality with SHA-256 signature verification and rollback protection.
What calibration standards are supplied with the system?
NIST-traceable Ni and Fe reference samples (certified M–H curves), plus primary current shunt calibrators for field intensity verification.
