title: Enhancement of Ferroelectricity for Orthorhombic (Tb0.861Mn0.121)MnO3-δby Copper Doping.
abstract: Copper-doped (Tb0.861Mn0.121)MnO3-δhas 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 qMn= (∼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.
authors.affiliation: College of Materials Science and Engineering, Guilin University of Technology , Guilin 541004, People's Republic of Chinaa.
authors.forename: Jianming
authors.initials: J
authors.lastname: Deng
authors.affiliation: 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.
authors.forename: Muhammad Asim
authors.identifier: http://orcid.org/0000-0002-2163-8623
authors.initials: MA
authors.lastname: Farid
authors.affiliation: Department of Chemistry, School of Science, Beijing Jiaotong University , Beijing 100044, People's Republic of China.
authors.forename: Meng
authors.initials: M
authors.lastname: Zhang
authors.affiliation: College of Materials Science and Engineering, Guilin University of Technology , Guilin 541004, People's Republic of Chinaa.
authors.forename: Aimei
authors.initials: A
authors.lastname: Yang
authors.affiliation: 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.
authors.forename: Hongxing
authors.initials: H
authors.lastname: Zhang
authors.affiliation: 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.
authors.forename: Hao
authors.initials: H
authors.lastname: Zhang
authors.affiliation: Neutron Scattering Laboratory, Department of Nuclear Physics, China Institute of Atomic Energy , Beijing 102413, People's Republic of China.
authors.forename: Gengfang
authors.initials: G
authors.lastname: Tian
authors.affiliation: Neutron Scattering Laboratory, Department of Nuclear Physics, China Institute of Atomic Energy , Beijing 102413, People's Republic of China.
authors.forename: Meimei
authors.initials: M
authors.lastname: Wu
authors.affiliation: College of Materials Science and Engineering, Guilin University of Technology , Guilin 541004, People's Republic of Chinaa.
authors.forename: Laijun
authors.initials: L
authors.lastname: Liu
authors.affiliation: 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.
authors.forename: Junliang
authors.initials: J
authors.lastname: Sun
authors.affiliation: 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.
authors.forename: Guobao
authors.initials: G
authors.lastname: Li
authors.affiliation: 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.
authors.forename: Fuhui
authors.initials: F
authors.lastname: Liao
authors.affiliation: 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.
authors.forename: Jianhua
authors.initials: J
authors.lastname: Lin