Investigation of Nuclear and Magnetic Structures in A-site Ordered Spinel LiFeCr4O8
We have been investigating the dielectric and magnetic properties of A-site ordered spinel, LiFeCr4O8 in view of multiferroic properties. The parent compound LiGaCr4O8 shows a strong magnetic frustration and undergoes antiferromagnetic ordering at very low temperature (14 K), while the compound with Fe3+ ion at the A-site shows multiple magnetic transitions; first it undergoes a ferrimagnetic ordering at high temperature (100 K) followed by two magnetic transitions at around 50 K and at 24 K and the latter is coupled with a structural transition. Interestingly, we observe ferroelectric polarization below 24 K suggesting that this compound is a magnetoelectric multiferroic. In order to understand the role of magnetic structure on the electric properties and magneto-structural coupling in LiFeCr4O8, we need to carry out a detailed investigation of the magnetic and nuclear structure of this material at different temperatures.
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SUNDARESAN Athinarayanan; SAHA Rana and SUARD Emmanuelle. (2015). Investigation of Nuclear and Magnetic Structures in A-site Ordered Spinel LiFeCr4O8. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-31-2375
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