Crystal and magnetic structures of the high pressure double perovskite (Ca0.5Mn0.5)2MnTeO6
Perovskite oxides ABO3 have become one of the most interesting classes of materials because of their notable magnetic, electric and optical properties. We recently showed that CaMnMnWO6 can be prepared in both double double perovskite DDPv-CaMnMnWO6 and double perovskite DPv-(Ca0.5Mn0.5)2MnWO6 polymorphs with interesting difference of magnetic properties; DDPv-CaMnMnWO6 is ferrimagnetic with TC = 45 K but Ca/Mn disorder in DPv-(Ca0.5Mn0.5)2MnWO6 gives a spin glass below Tg = 8 K. We are now investigating possible analogues and we have recently synthesised DPv-(Ca0.5Mn0.5)2MnTeO6 which has ~75 K and ~5 K magnetic anomalies. Powder neutron diffraction is needed to discover whether a spin ordered or glassy ground state is formed as well as for accurate structure refinement. We request 1 day of beamtime at D20 to study the small amount of high pressure sample available.
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J. Paul Attfiel;d; ALMADHI Azizah; JI Kunlang; KLOSS Simon; RITTER Clemens and YUAN Yao. (2023). Crystal and magnetic structures of the high pressure double perovskite (Ca0.5Mn0.5)2MnTeO6. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-31-2948
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