title: Magnetic structure and properties of the rechargeable battery insertion compound Na2FePO4F.
abstract: The magnetic structure and properties of sodium iron fluorophosphate Na2FePO4F (space group Pbcn), a cathode material for rechargeable batteries, were studied using magnetometry and neutron powder diffraction. The material, which can be described as a quasi-layered structure with zigzag Fe-octahedral chains, develops a long-range antiferromagnetic order below ∼3.4 K. The magnetic structure is rationalized as a super-exchange-driven ferromagnetic ordering of chains running along the a-axis, coupled antiferromagnetically by super-super-exchange via phosphate groups along the c-axis, with ordering along the b-axis likely due to the contribution of dipole-dipole interactions.
authors.affiliation: Bragg Institute, B87, Australian Nuclear Science and Technology Organization , Locked Bag 2001, Kirrawee DC NSW 2232, Australia.
authors.forename: Maxim
authors.initials: M
authors.lastname: Avdeev
authors.forename: Chris D
authors.initials: CD
authors.lastname: Ling
authors.forename: Thiam Teck
authors.initials: TT
authors.lastname: Tan
authors.forename: Sean
authors.initials: S
authors.lastname: Li
authors.forename: Gosuke
authors.initials: G
authors.lastname: Oyama
authors.forename: Atsuo
authors.initials: A
authors.lastname: Yamada
authors.forename: Prabeer
authors.initials: P
authors.lastname: Barpanda