Perfect diamagnetism

Japanese: 完全反磁性 - かんぜんはんじせい（英語表記）perfect diamagnetism

This refers to the magnetic property of a material in which the magnetic flux density inside the material is 0 when a magnetic field is applied, and the magnetic field inside and outside the material completely disappears when the magnetic field is removed, meaning that the magnetic permeability of this material is 0. Superconductors are known to exhibit perfect diamagnetism, which is called the Meissner effect.

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

Japanese:

磁場を加えたときに物質内部の磁束密度が0であり，さらに磁場を取除いたときに物質の内外の磁場が完全に消滅する物質の磁気的性質をいい，この物質の透磁率は0であることを意味する。超伝導体は完全反磁性を示すことが知られており，これをマイスナー効果という。

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