Double and double double perovskites in the RMnMnTaO6 series
Double and double double perovskites in the RMnMnTaO6 series
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RMnMnTaO6 系列中的双钙钛矿和双双钙钛矿
DOI:
10.1016/j.jssc.2022.123329
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发表时间:
2022
影响因子:
3.3
通讯作者:
Ji K
中科院分区:
文献类型:
--
作者:
Ji K
A new family of perovskites RMnMnTaO6has been synthesised at high pressure for representative R = La, Nd, Sm, Eu, Gd, Y and Lu that span the whole rare earth series. The structure type changes from tetragonalP42/ndouble double perovskite (DDPv) type with columnar R3+/Mn2+cation order (R = La, Nd, Sm) to monoclinicP21/ndouble perovskite (DPv) (R0.5Mn0.5)2MnTaO6(R = Sm, Gd, Y, Lu) as R3+cation size decreases. No antisite disorder or nonstoichiometry is observed. Spin ordering transitions are observed below 70 K and a neutron diffraction study of DDPv NdMnMnTaO6reveals ferrimagnetic orders atTC1= 65 K andTC2= 40 K with Mn-spin reorientation due to Nd moment order atTC2leading to magnetoelastic coupling.
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