Magnetostriction - Jiwai (English spelling) magnetostriction

Japanese: 磁歪 - じわい(英語表記)magnetostriction
Magnetostriction - Jiwai (English spelling) magnetostriction
Also known as magnetostriction. The phenomenon in which the external shape of a ferromagnetic material changes when it is magnetized, or this deformation. The rate of distortion due to deformation is very small, about 10 -5 to 10 -6 . This is because the energy of the interactions between the spins that create the magnetic moment is a function of the distance between the spins, so when ferromagnetism occurs, the crystal lattice distorts so that the sum of this and the elastic energy is minimized. In this way, the magnetic domains are distorted in the direction of the spontaneous magnetization by about 10 -5 to 10 -6 . Because magnetostriction is a phenomenon in which both magnetic and mechanical forces are combined, it can be used to convert forces into each other.

Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information

Japanese:
磁気ひずみともいう。強磁性体を磁化したとき,その外形が変形する現象またはその変形。変形によるひずみの割合は非常にわずかで 10-5~10-6 程度である。その原因は,磁気モーメントをになうスピン間の相互作用のエネルギーがスピン間の距離の関数であるために,強磁性の発生とともに弾性エネルギーとの和が最小になるように結晶格子がゆがむためである。こうして磁区は自発磁化の方向に 10-5~10-6 程度ひずむ。このように磁歪は磁気的な力と力学的な力との両者が結びついた現象であるため,力を相互に変換するのに利用されることがある。

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