Possible charge order structure of stoichiometric YbFe2O4

Kosuke Fujiwara (1) , Tomoyuki Karasudani (1) , Mamoru Fukunaga (1) , Hiroyuki Kobayashi (1) , Jun Kano (2) , Pierre-Eymeric Janolin (3) , Jean-Michel Kiat (3, 4) , Yoshio Nogami (1) , Ryusuke Kondo (1) , Naoshi Ikeda (1)

1 Okayama University
2 PRESTO [JST
3 SPMS - Laboratoire Structures, Propriétés et Modélisation des solides
4 LLB - UMR 12 - Laboratoire Léon Brillouin

We report a possible charge ordering model of triangular mixed valence material YbFe2O4. It was found that a crystal synthesized with high stoichiometry on iron vacancy shows new and simple extinction rule in the superlattice reflections. The Laue class of the diffraction signal is expressed as 2/m. With the consideration of the charge neutrality and the superlattice signal of (1/3 1/3 0), we derived 5 possible charge ordering models of this material.

Mots clés: Electric Ferroelectricity; Charge Order; YbFe2O4

Domaines: Science des matériaux [cond-mat.mtrl-sci]; Physique [physics]; Matière Condensée [cond-mat]

Kosuke Fujiwara, Tomoyuki Karasudani, Mamoru Fukunaga, Hiroyuki Kobayashi, Jun Kano, et al.. Possible charge order structure of stoichiometric YbFe2O4. Ferroelectrics, 2017, 512 (1), pp.85 - 91. ⟨10.1080/00150193.2017.1349945⟩. ⟨hal-01779580⟩