Angle this magnet withershins to an angle that is the multiple of 5o, then measure its magnetizing remanent magnetization curves along H direction.

将该半球的左半部分分成18个5o的瓣，按5o间隔逆时针转动，在原磁场方向测量磁化剩磁曲线，得到一系列磁化剩磁曲线。