Characterisation of doped honeycomb-like multiferroics MnAMo 3 O 8 (A2+ = Fe, Co and Zn) Holly McPhillips 1 , Gavin B. G. Stenning 1 , Laura J. Vera Stimpson 2 , Donna C. Arnold 3 and Silvia Ramos 1 1 University of Kent, UK, 2 Rutherford Appleton Laboratory, UK 3 Canterbury Christ Church University, UK Multiferroic materials that have multiple order parameters co-existing in a single phase and exhibit magnetoelectric (ME) coupling have attracted great interest in the scientific community. In these materials, magnetic properties and electric polarisation are coupled, resulting in interesting, complex magnetic states with potential applications in technological devices. We are investigating the structural and magnetic properties of the manganese family of polar hexagonal ( S = 5/2) layered oxides Mn 2 Mo 3 O 8 and Mn A Mo 3 O 8 where A 2+ = Fe 2+ , Co 2+ and Zn 2+ (P 6 3 mc). These are type-II multiferroic materials, where electric polarization arises as a result of complex magnetic order. The properties of these materials are driven by the Mn( A ) honeycomb layer and little contribution is made from the trimerised molybdenum layer. Mn 2 Mo 3 O 8 is reported to have an easy-axis-type ferrimagnetic ground state below T N = 41 K. 1,2 Doping the structure disrupts this magnetic ordering. However, such investigations, which have been carried out for the series Fe 1-x Zn x Mo 3 O 8 , have been limited to spectroscopy and magnetometry studies, which provided limited comment on the nature of the cation order in these type of materials. 3 An equivalent and deeper investigation is yet to be carried out for doping Mn 2 Mo 3 O 8 . Therefore, we are interested in commenting further on the magnetic order observed for Mn 2 Mo 3 O 8 , and understanding further the cation ordering when this material is doped with other 3 d metals, as the discussion is limited for both. Here, we present some of the preliminary characterisation carried out for these materials in preparation for future experiments., which will enhance our understanding of the structure-property relationship(s) in this manganese family. References 1. S. P. McAlister, J. Appl. Phys. , 1984, 55 , 2343–2345 2. D. Szaller, K. Szász, S. Bordács, J. Viirok, T. Rõõm, U. Nagel, A. Shuvaev, L. Weymann, A. Pimenov, A. A. Tsirlin, A. Jesche,
L. Prodan, V. Tsurkan and I. Kézsmárki, Phys. Rev. B , 2020, 102 , 1–8. 3. T. Kurumaji, S. Ishiwata and Y. Tokura, Phys. Rev. X , 2015, 5 , 1–7.
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