ion crystal

ion crystal

[′ī‚än ‚krist·əl]
(atomic physics)
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Under the application of a weak static magnetic field, this ring-shaped ion crystal will begin a rotation that will never stop.
They found that applying a force in the appropriate direction increased the distance between ion layers in a different direction, confirming that an ion crystal can exhibit a negative Poisson's ratio without a change in volume.
Baughman and his colleagues suggest that similar behavior can occur in colloidal crystals, which consist of widely separated, regularly spaced microscopic particles suspended in a liquid; in assemblages of dust particles in electrically charged gases (SN: 8/6/94); and in laser-cooled ion crystals (SN: 1/31/98).