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Magnetic dipole–dipole interaction, also called dipolar coupling, refers to the direct interaction between two magnetic dipoles. Suppose m1 and m2 are two magnetic dipole moments that are far enough apart that they can be treated as point dipoles in calculating their interaction energy. The potential energy H of the interaction is then given by: where r̂ is a unit vector in the direction of the line joining the two spins, and |r| is the distance between them. Finally, the interaction energy can be expressed as the dot product of the moment of either dipole into the field from the other dipole:

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dbo:abstract
  • L’interaction magnétique dipôle-dipôle, aussi appelée couplage dipolaire, fait référence à l'interaction directe entre deux dipôles magnétiques. L'énergie de cette interaction s'exprime de la manière suivante : où μ0 est la constante magnétique, ejk est un vecteur unité parallèle à la droite joignant les centres des deux dipôles, rjk est la distance entre ces deux dipôles mk et mj. Pour deux spins nucléaires en interaction : , et rjk sont les rapports gyromagnétiques de deux spins et la distance spin-spin respectivement. (fr)
  • Magnetic dipole–dipole interaction, also called dipolar coupling, refers to the direct interaction between two magnetic dipoles. Suppose m1 and m2 are two magnetic dipole moments that are far enough apart that they can be treated as point dipoles in calculating their interaction energy. The potential energy H of the interaction is then given by: where μ0 is the magnetic constant, r̂ is a unit vector parallel to the line joining the centers of the two dipoles, and |r| is the distance between the centers of m1 and m2. Last term with -function vanishes everywhere but the origin, and is necessary to ensure that vanishes everywhere. Alternatively, suppose γ1 and γ2 are gyromagnetic ratios of two particles with spin quanta S1 and S2. (Each such quantum is some integral multiple of 1/2.) Then: where r̂ is a unit vector in the direction of the line joining the two spins, and |r| is the distance between them. Finally, the interaction energy can be expressed as the dot product of the moment of either dipole into the field from the other dipole: where B2(r1) is the field that dipole 2 produces at dipole 1, and B1(r2) is the field that dipole 1 produces at dipole 2. It is not the sum of these terms. The force F arising from the interaction between m1 and m2 is given by: Fourier transform of H can be calculated from the fact that and is given by (en)
  • 磁気双極子相互作用または双極子カップリングは、2つの磁気双極子間の直接相互作用のことである。 古典的な磁気双極子相互作用の例としては、2つ磁石の間に働く引力・斥力がある。2つの磁石の位置・向きによって引力が働いたり斥力が働いたりする。相互作用は2つの磁石が近いほど強くなる。相互作用のポテンシャルエネルギーは、 ここで、ejkは2つの双極子mkとmjの中心を結ぶ直線に平行な単位ベクトルである。rjkは2つの磁気双極子の間の距離である。 量子力学におけるスピンは、磁気双極子モーメントを持っている。よってスピンは磁気双極子として見なせるため、スピンの間には磁気双極子相互作用が働く。核スピン間の相互作用は、以下のように表せる。 、はそれぞれのスピンの磁気回転比である。 (ja)
dbo:wikiPageID
  • 7904551 (xsd:integer)
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  • 5863 (xsd:nonNegativeInteger)
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  • 1121585491 (xsd:integer)
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dbp:date
  • November 2022 (en)
dbp:reason
  • The equations and descriptions are fairly convoluted. A more physical description, rather than just mathematical description, could be useful. (en)
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rdfs:comment
  • L’interaction magnétique dipôle-dipôle, aussi appelée couplage dipolaire, fait référence à l'interaction directe entre deux dipôles magnétiques. L'énergie de cette interaction s'exprime de la manière suivante : où μ0 est la constante magnétique, ejk est un vecteur unité parallèle à la droite joignant les centres des deux dipôles, rjk est la distance entre ces deux dipôles mk et mj. Pour deux spins nucléaires en interaction : , et rjk sont les rapports gyromagnétiques de deux spins et la distance spin-spin respectivement. (fr)
  • 磁気双極子相互作用または双極子カップリングは、2つの磁気双極子間の直接相互作用のことである。 古典的な磁気双極子相互作用の例としては、2つ磁石の間に働く引力・斥力がある。2つの磁石の位置・向きによって引力が働いたり斥力が働いたりする。相互作用は2つの磁石が近いほど強くなる。相互作用のポテンシャルエネルギーは、 ここで、ejkは2つの双極子mkとmjの中心を結ぶ直線に平行な単位ベクトルである。rjkは2つの磁気双極子の間の距離である。 量子力学におけるスピンは、磁気双極子モーメントを持っている。よってスピンは磁気双極子として見なせるため、スピンの間には磁気双極子相互作用が働く。核スピン間の相互作用は、以下のように表せる。 、はそれぞれのスピンの磁気回転比である。 (ja)
  • Magnetic dipole–dipole interaction, also called dipolar coupling, refers to the direct interaction between two magnetic dipoles. Suppose m1 and m2 are two magnetic dipole moments that are far enough apart that they can be treated as point dipoles in calculating their interaction energy. The potential energy H of the interaction is then given by: where r̂ is a unit vector in the direction of the line joining the two spins, and |r| is the distance between them. Finally, the interaction energy can be expressed as the dot product of the moment of either dipole into the field from the other dipole: (en)
rdfs:label
  • Interaction magnétique dipôle-dipôle (fr)
  • Magnetic dipole–dipole interaction (en)
  • 磁気双極子相互作用 (ja)
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