Enhancement of Ferroelectricity for Orthorhombic (Tb0.861Mn0.121)MnO3-δ by Copper Doping

Jianming Deng; Muhammad Asim Farid; Meng Zhang; Aimei Yang; Hongxing Zhang; Hao Zhang; Gengfang Tian; Meimei Wu; Laijun Liu; Junliang Sun; Guobao Li; Fuhui Liao; Jianhua Lin

doi:10.1021/acs.inorgchem.6b03024

Enhancement of Ferroelectricity for Orthorhombic (Tb_0.861Mn_0.121)MnO_3-δ by Copper Doping

Inorg Chem. 2017 Mar 20;56(6):3475-3482. doi: 10.1021/acs.inorgchem.6b03024. Epub 2017 Feb 27.

Authors

Affiliations

¹ College of Materials Science and Engineering, Guilin University of Technology , Guilin 541004, People's Republic of Chinaa.
² Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University , Beijing 100871, People's Republic of China.
³ Department of Chemistry, School of Science, Beijing Jiaotong University , Beijing 100044, People's Republic of China.
⁴ Neutron Scattering Laboratory, Department of Nuclear Physics, China Institute of Atomic Energy , Beijing 102413, People's Republic of China.

PMID: 28240880
DOI: 10.1021/acs.inorgchem.6b03024

Abstract

Copper-doped (Tb_0.861Mn_0.121)MnO_3-δ has been synthesized by the conventional solid state reaction method. X-ray, neutron, and electron diffraction data indicate that they crystallize in Pnma space group at room temperature. Two magnetic orderings are found for this series by neutron diffraction. One is the ICAM (incommensurate canted antiferromagnetic) ordering of Mn with a wave vector q_Mn = (∼0.283, 0, 0) with a ≈ 5.73 Å, b ≈ 5.31 Å, and c ≈ 7.41 Å, and the other is the CAM (canted antiferromagnetic) ordering of both Tb and Mn in the magnetic space group Pn'a2₁' with a ≈ 5.73 Å, b ≈ 5.31 Å, and c ≈ 7.41 Å. A dielectric peak around 40 K is found for the samples doped with Cu, which is higher than that for orthorhombic TbMnO₃.