Samarium Cobalt magnet is a type of powerful rare earth permanent magnet which composed of three basic elements Samarium (Sm), Cobalt (Co), and Iron (Fe). Minor amounts of Copper (Cu) and Zirconium (Zr) is served to adjust magnetic performance. SmCo disc magnet is generally dimensioned in accordance with diameter (D) and thickness (T). SmCo disc magnet is typically metallic in appearance and no need for protective surface treatment due to its own superior corrosion resistance. In addition, SmCo disc magnet also has very considered high resistance to demagnetization, thus perform well under high or very low temperature conditions. 5G circulator magnet is the most representative application of SmCo disc magnet in recent years.
SmCo Disc Magnet Calculator
Notes:
- This calculator adapts to non-coating and non-chamfer magnet.
- Gauss value is based on Biot-Savart law and applicable to calculate gauss value of pole face’s geometric center.
- Surface gauss value decreased as the air gap increased, therefore, both encapsulation of hall component and neglected air gap have the significant role on the accuracy of gauss value. We recommend users set the air gap between 0.3 and 0.5mm.
- Measurement repeatability of surface gauss is relatively low even testing point is the geometric center. It must be pointed that surface gauss cannot represent the overall magnetic performance of the magnet in comparison with magnetic flux or magnetic moment.
- Air gap between magnet and steel plate in calculator is 0mm. In reality, even very small air gap will generate dramatic influence on the pull force in both theoretical calculations and the actual measurement.
- Besides magnet’s material, grade, and dimension, pull force is also impacted by steel plate’s material, composition, and surface condition. Steel plate should be thick enough to carry all magnetic flux or result in the low pull force owing to magnetic saturation.
- Above calculation results are only for reference.
