这些材料的一个显著特点是，在低温时，母体化合物会发生结构相变和反铁磁相变。
One of the most remarkable character of these materials is that the parent compounds have a structure transition and a antiferromagnetic transition at low temperatures.
人们普遍认为，超导的产生应该和磁性阻挫有着内在的联系，因为磁性阻挫很可能会导致结构相变和反铁磁相变。
It is widely expected that the superconductivity should be intrinsically connected to the frustrated magnetic correlations which presumably cause both structure and antiferromagnetic transitions.
掺杂导致原有的G型反铁磁序发生变化，形成了亚铁磁序的磁结构，材料的铁磁性有了很大提高；
The ferromagnetism can be significantly improved since the doping of Co changes the G antiferromagnetic order into the ferromagnetic one.
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