Checkerboard to Stripe Charge Ordering Transition in TbBaFe2O5

Abstract

A combined neutron and x-ray diffraction study of TbBaFe2O5 reveals a rare checkerboard to charge ordering transition. TbBaFe2O5 is a mixed valent compound where Fe2+/Fe3+ ions are known to arrange into a stripe charge-ordered state below TV = 291 K, that consists of alternating Fe2+/Fe3+ stripes in the basal plane running along the b direction. Our measurements reveal that the stripe charge-ordering is preceded by a checkerboard charge-ordered phase between TV < T < T* = 308 K. The checkerboard ordering is stabilized by inter-site coulomb interactions which give way to a stripe state stabilized by orbital ordering.

5 pages, 5 figures

References in corpus (4)

• Spontaneous rearrangement of the checkerboard charge order to stripe order in La1.5Sr0.5NiO4
• Charge order at the frontier between the molecular and solid states in Ba3NaRu2O9
• A crystallographic phase transition within the magnetically ordered state of Ce_2Fe_17
• Stripes and Superconductivity in Cuprates

Cited by in corpus (1)

• Superconductivity and Disorder Effect in TlNi${}_2$Se${}_{2-x}$S${}_x$ crystals