Magnetic structure and charge ordering in Fe3BO5 ludwigite

Pierre Bordet (1) , Emmanuelle Suard (2)

1 NEEL - MRS - Matériaux, Rayonnements, Structure
2 ILL - Institut Laue-Langevin

The crystal and magnetic structures of the three-leg ladder compound Fe3BO5 have been investigated by single crystal x-ray diffraction and neutron powder diffraction. Fe3BO5 contains two types of three-leg spin ladders. It shows a charge ordering transition at 283 K, an antiferromagnetic transition at 112 K, ferromagnetism below 70 K and a weak ferromagnetic behavior below 40K. The x-ray data reveal a smooth charge ordering and an incomplete charge localization down to 110K. Below the first magnetic transition, the first type of ladders orders as ferromagnetically coupled antiferromagnetic chains, while below 70K the second type of ladders orders as antiferromagnetically coupled ferromagnetic chains.

Mots clés: charge ordering; spin ladder; magnetic structure; neutron diffraction

Domaines: Electrons fortement corrélés [cond-mat.str-el]

Pierre Bordet, Emmanuelle Suard. Magnetic structure and charge ordering in Fe3BO5 ludwigite. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2009, 79, pp.144408. ⟨10.1103/PhysRevB.79.144408⟩. ⟨hal-00371436⟩