Magnetic Structure and Properties of the Rechargeable Battery Insertion Compound Na2FePO4F

作者：Avdeev Maxim^*; Ling Chris D; Tan Thiam Teck; Li Sean; Oyama Gosuke; Yamada Atsuo; Barpanda Prabeer

来源：Inorganic Chemistry, 2014, 53(2): 682-684.

DOI：10.1021/ic402513d

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 similar to 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.

• 出版日期2014-1-20