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28 March 2024
 
  » arxiv » cond-mat/0208518

 Article overview


New Stacking Variations of the CE-type Structure in the Metal-Ordered Manganite YBaMn2O6
H. Kageyama ; T. Nakajima ; M. Ichihara ; Y. Ueda ; H. Yoshizawa ; K. Ohoyama ;
Date 27 Aug 2002
Subject Strongly Correlated Electrons | cond-mat.str-el
AbstractFor the paramagnetic insulating phase in the metal-ordered manganite YBaMn2O6, the so-called CE-type of charge/orbital ordered state was observed within the monoclinic ab-plane, which is most commonly observed for the ordinary half doped manganites. However, TEM revealed a 4-fold periodicity along the c-axis, suggesting a new stacking pattern, where planes of the CE-type are built up according to the sequence [aabb...]. Interestingly, when th system enters into the antiferromagnetic state, this stacking pattern changes into [aaaa...] or [abab], suggesting close interplay between spins and orbitals. These features are discusses in terms of inherent structural alternation, i.e., the Y/Ba order along the c-axis.
Source arXiv, cond-mat/0208518
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