A model on the coercivity of the hardened 2–17 rare earth‐cobalt permanent magnets

摘要

A microstructure geometry with cells as rhombic hexahedrons which are separated from each other by a thin layer wall is given. Non‐coherent wriggle domain wall displacement mechanism is proposed. An expression for the coercive force Hc = (√3)Δγ/(2Msd) has been derived. The calculated values are fairly in agreement with the measured values either qualitatively or quantitatively.