Magnetic and crystal structures of NiFe3O5
Iron oxides have useful magnetic and electrical properties leading to extensive applications, e.g. the spinel ferrites. Using high temperatures and pressures we have synthesised the new phase NiFe3O5. We request 2 days on D20 with cryostat and furnace to collect high resolution diffraction patterns between 2 to 500 K from a 50 mg sample.We will determine the magnetic structure(s) of NiFe3O5 below the ~400 K magnetic ordering temperature and through the anomalies at 275 and 30 K in the susceptibility. We will also investigate possible structural changes associated with the magnetostriction and likely low temperature Fe2+/Fe3+ charge ordering, with associated Fe2+ orbital distortions, which is found in Mn and Fe analogues. The high flux and resolution of D20 are required in order to refine the magnetic moments at up to three cation sites for this complex material that is only available in small quantities.
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J. Paul Attfiel;d; HAKALA Branislav Viliam; Jacky (Ka Hou) Hong; RITTER Clemens and Elena Solana-Madruga. (2018). Magnetic and crystal structures of NiFe3O5. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-31-2602
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