Diamagnetic materials are not magnetic. The reason is the lack of single electrons with their magnetic dipoles. An external magnetic field, however, induces a magnetic field.

The following applies to the pairs of electrons:

• they are entangled particles (Pauli principle) and their anti-parallel aligned magnetic dipoles result in a magnetic field that is largely self-contained and does not appear macroscopically,
• after the external magnetic field has disappeared the thermal movements of the atoms destroy the - forced by the external magnetic field - alignment of the dipoles.

<aside> 📌 Presumtion: Diamagnetic materials have entangled electrons (Pauli pairs) whose magnetic dipoles compensate mainly each other. ↓24↓

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<aside> 📌 Präsumtion: Due to an external magnetic field, the electrons are partially aligned by the external field. With the removal of the external field, the electrons return to their initial positions. ↓25↓

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Diamagnetism and magnetic field flux