feeble magnetism

…Although it does not show the remarkable effect of ferromagnetism, the property of producing weak magnetization in the opposite direction to the force (magnetic field) exerted by a magnet is called diamagnetism, and the property of producing magnetization parallel to the direction of the magnetic field is called paramagnetism, and materials that have such magnetism are called diamagnetic materials and paramagnetic materials, respectively. In contrast to ferromagnetism, diamagnetism and paramagnetism are sometimes called weak magnetism or feeble magnetism. In addition, superconductors exhibit a unique magnetic property called perfect diamagnetism (superconductivity). …

*Some of the terminology that mentions "feeble magnetism" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…強磁性のような著しい効果は示さないが，磁石が及ぼす力(磁場)の方向に対して逆の方向に弱い磁化を生ずる性質を反磁性，磁場の方向に平行な磁化を生ずる性質を常磁性といい，そのような磁性をもつ物質をそれぞれ反磁性体，常磁性体と呼ぶ。強磁性に対し，反磁性，常磁性を弱い磁性，または弱磁性feeble magnetismということがある。また超伝導体は完全反磁性と呼ばれる特異な磁性を示す(超伝導)。…

※「feeble magnetism」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報