Publication Type:Journal Article
Source:Physical Review Letters, Volume 106, Number 18 (2011)
Keywords:Antiferromagnetic transition temperature, Antiferromagnetism, Colossal magnetoresistance, Colossal magnetoresistance effect, Electric resistance, Ferromagnetic materials, Ferromagnetic metallic state, Ferromagnetism, Insulating state, Manganese oxide, Manganites, Soft X-ray, Spin ordering
We present resonant soft x-ray scattering results from small bandwidth manganites (Pr,Ca)MnO3, which show that the CE-type spin ordering (SO) at the phase boundary is stabilized only below the canted antiferromagnetic transition temperature and enhanced by ferromagnetism in the macroscopically insulating state (FM-I). Our results reveal the fragility of the CE-type ordering that underpins the colossal magnetoresistance effect in this system, as well as an unexpected cooperative interplay between FM-I and CE-type SO which is in contrast to the competitive interplay between the ferromagnetic metallic state and CE-type ordering. © 2011 American Physical Society.
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