Application of Gauss Meter

Gaussmeters are generally used to test the magnetic flux of some magnetic materials. In order to better choose suitable products, it is necessary for us to understand which are hard magnetic materials and which are soft magnetic materials?

Gauss meter test object 1: hard magnetic materials

　　Permanent magnetic functional materials are often called permanent magnetic materials, also known as hard magnetic materials, and soft magnetic functional materials are often called soft magnetic materials. The hardness and softness here do not refer to the hardness and softness of mechanical properties, but to the hardness and softness of magnetic properties.

1. Magnetic hardness means that the magnetic material can retain its strong magnetism (referred to as magnetism) for a long time after being magnetized by an external magnetic field, which is characterized by high coercivity (coercive magnetic field). Coercivity is the magnetic field strength at which the magnetic material is magnetized and then demagnetized to reduce the residual magnetism (residual magnetic flux density or residual magnetization) to zero.

2. Soft magnetic materials are magnetic materials with very low coercivity, which are easy to magnetize and easy to demagnetize when a magnetic field is applied. Demagnetization refers to a magnetic field in which a magnetic field (called a magnetizing field) is applied to magnetize a magnetic material, and a magnetic field opposite to the direction of the magnetizing field is added to reduce its magnetic properties.

　Gauss meter measured object - commonly used permanent magnet materials mainly have 4 kinds of magnetic properties:

　　(1) High maximum magnetic energy product. The maximum magnetic energy product [symbolized as (BH)m] is a measure of the maximum magnetic energy density stored and available per unit volume of a permanent magnet material;

(2) High coercivity (magnetic) force. Coercive force [symbolized as (H)c] is a measure of how a permanent magnet material retains its permanent magnetism against both magnetic and non-magnetic disturbances;

(3) High residual magnetic flux density (symbol Br) and high residual magnetization (symbol Mr). They are a measure of the strength of the magnetic field in the air gap of a permanent magnet material with an air gap;

(4) High stability, that is, high stability of external disturbance magnetic field and changes in environmental factors such as temperature and vibration.