Author Archives: Editorial Staff

Industrial Magnetics, Inc. Announces New Metal Detectable & X-Ray Inspectable Seals and Gaskets

Bunting Magnetics Europe Ltd Secures Quality and Environmental Accreditation

April 2017

  • Recent Developments and Trends in Nd-Fe-B Magnets
  • Miniaturized LC Filters for Suppression of EMI
  • Kool MĶ MAX: The Next Generation of Sendust Cores from Magnetics
  • CST Studio Suite Version 2017 Now Shipping
  • Permanent Magnet Market Size to Surpass $50 Billion by 2024

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Magnetometry Measurements: Considerations for Magnetic and First-Order-Reversal-Curve Measurements

Brad C. Dodrill, Lake Shore Cryotronics, Inc.

Magnetometers are used to characterize magnetic material properties. Magnetometry techniques can be broadly classified into two categories: inductive and force-based. Common inductive methods include vibrating sample magnetometry (VSM), extraction magnetometry, AC susceptometry and superconducting quantum interference device (SQUID) magnetometry. The two most commonly used inductive techniques are VSM and SQUID magnetometry. Alternating gradient magnetometry (AGM) is the most often used force-based technique. The measurement most commonly performed to characterize a materialís magnetic properties is that of a major hysteresis loop. The hysteresis or M(H) loop is typically used to determine a materialís saturation magnetization Ms (the magnetization at maximum applied field), remanence Mr (the magnetization at zero applied field after applying a saturating field) and coercivity Hc (the field required to demagnetize the material). More complex magnetization curves covering states with field and magnetization values located inside the major hysteresis loop, such as first-order-reversal-curves (FORCs), can provide additional information that can be used to characterize magnetic interactions and coercivity distributions in magnetic materials[1].

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Magnet Applications, Inc. Expands Online Tech Center and Launched Calculator Apps

Magnet Applications, Inc. Awarded ITAR Certification

Momentum Licenses ORNL Technology