Ferromagnetic enhancement of CE-type spin ordering in (Pr,Ca)MnO 3
Zhou, S.Y., Y. Zhu, M.C. Langner, Y.-D. Chuang, P. Yu, W.L. Yang, A.G. Gonzalez, N. Tahir, M. Rini, Y.-H. Chu, Ramamoorthy Ramesh, D.-H. Lee, Y. Tomioka, Y. Tokura, Z. Hussain, R.W. Schoenlein
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.
Physical Review Letters
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