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==Rotation Physics== A magnetic moment in the presence of a magnetic field experiences a torque that attempts to bring the moment and field vectors into alignment. The classical expression for this alignment torque is given by :, and shows that the torque is proportional to the strengths of the moment and field and to the angle of misalignment between them. From classical mechanics, torque is defined as the time rate of change of angular momentum or, stated mathematically, :. Absent any other effects, this change in angular momentum would be realized through the dipole moment coming into rotation to align with the field. 抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Magnetization dynamics」の詳細全文を読む スポンサード リンク
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