| 11. | Without an external field there are local anisotropies of different orientations, due to spontaneous magnetization.
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| 12. | The external field replaces the interaction of all the other particles to an arbitrary particle.
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| 13. | As the external field surpasses the hard material's coercivity, the hard magnet gets fully demagnetized.
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| 14. | Thus Rydberg atoms are extremely large with loosely bound ionized by collisions or external fields.
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| 15. | The n-body system is replaced by a 1-body problem with a chosen good external field.
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| 16. | Electron density shields a nucleus from the external field.
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| 17. | The microwave penetration depth is determined by the superfluid density responsible for screening the external field.
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| 18. | The amount of this torque is proportional both to the magnetic moment and the external field.
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| 19. | These adjustments or reactions to external field changes constituted the absorption of radiation for the particle.
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| 20. | But in a ferromagnetic material, all the atomic moments are aligned even without an external field.
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