My first Magazine SFI Little Book - April Re-print edits included | 页面 12

14
Magnetism Switch
Further work by the same group at AMBER revealed
how magnetism can be suddenly switched on by
adding an extra layer just one atom thick to a thin
film of a specific oxide material. When thin layers of
this material were grown, it was discovered that the
magnetism was sensitive to the slightest change in layer
thickness. Below 5 layers of these atoms, the material is
non-magnetic, but magnetism is switched on abruptly
when the number of layers changes from 5 to 6 (or more).
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