Paramagnetism

Japanese: paramagnetism
Paramagnetism

... In the case of electrons bound to atoms (localized electrons), the change in their motion due to a magnetic field can be described by Larmor's theorem, which states that while the magnetic field is small, the electron's rotational motion around the nucleus with angular velocity eH / 2mc ( e is the charge of the electron, H is the magnitude of the magnetic field, m is the mass of the electron, and c is the speed of light) can be added to the motion when the magnetic field is zero, and the diamagnetic susceptibility can be easily calculated.
[Paramagnetism]
Atoms in a material may have a magnetic moment even in the absence of a magnetic field. Electrons have a magnetic moment due to their own spin and, in the case of electrons localized in an atom, due to their orbital motion around the nucleus.

*Some of the terminology explanations that mention "paramagnetism" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

… 原子に束縛された電子の場合(局在電子),磁場による電子の運動の変化は,磁場が小さい間は磁場の方向を軸とする角速度eH/2mc(eは電子の電荷,Hは磁場の大きさ,mは電子の質量,cは光の速度)の原子核のまわりの回転運動を,磁場が0のときの運動につけ加えればよいというラーモアの定理で記述され,反磁性磁化率は容易に求めることができる。
[常磁性paramagnetism]
 物質中の原子が磁場がないときでも磁気モーメントをもっている場合がある。電子はそれ自身のスピンに基づく磁気モーメントおよび原子に局在した電子の場合には原子核のまわりの軌道運動に基づく磁気モーメントをもつ。…

※「paramagnetism」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

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