Ferromagnetic Enhancement of CE-type Spin Ordering in (Pr,Ca)MnO${}_3$

Abstract

We present resonant soft X-ray scattering (RSXS) results from small band width manganites (Pr,Ca)MnO${}_3$, 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 (CMR) 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 (FM-M) state and CE-type ordering.

Accepted for publication in Phys. Rev. Lett

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