title: Multiferroicity Broken by Commensurate Magnetic Ordering in Terbium Orthomanganite.
abstract: TbMnO3 is an important multiferroic material with strong coupling between magnetic and ferroelectric orderings. Incommensurate magnetic ordering is suggested to be vital for this coupling in TbMnO3 , which can be modified by doping at the site of Tb and/or Mn. Our study shows that a self-doped solid solution Tb1-x Mny MnO3 (y≤x) can be formed with Mn doped into the site of Tb of TbMnO3 . When y is small Tb1-x Mny MnO3 shows both ferroelectric and incommensurate magnetic orders at low temperature, which is similar to TbMnO3 . However, if y is large enough, a commensurate antiferromagnetic ordering appears along with the incommensurate magnetic ordering to prevent the appearance of multiferroicity in Tb1-x Mny MnO3 . That is to say, the magnetoeletric coupling can be broken by the co-existence of a commensurate antiferromagnetic ordering. This finding may be useful to the study of TbMnO3 .
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, P. R. China.
authors.forename: Hao
authors.initials: H
authors.lastname: Zhang
authors.affiliation: Canadian Neutron Beam Centre, Chalk River Laboratories, Chalk River, ON, K0J 1J0, Canada.
authors.forename: Roxana
authors.initials: R
authors.lastname: Flacau
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, P. R. China.
authors.forename: Xin
authors.initials: X
authors.lastname: Du
authors.affiliation: ISIS Neutron Facility, STFC Rutherford Appleton Laboratory, Chilton, Oxfordshire, OX11 0QX, UK.
authors.forename: Pascal
authors.initials: P
authors.lastname: Manuel
authors.affiliation: Institute of Physics Chinese Academy of Sciences, Beijing, 100190, P.R. China.
authors.forename: Junzhuang
authors.initials: J
authors.lastname: Cong
authors.affiliation: Institute of Physics Chinese Academy of Sciences, Beijing, 100190, P.R. China.
authors.forename: Young
authors.initials: Y
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, P. R. China.
authors.forename: Junliang
authors.initials: J
authors.lastname: Sun
authors.affiliation: School of Chemistry, University of Nottingham University Park, Nottingham, NG7 2RD, UK.
authors.forename: Sihai
authors.initials: S
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, P. R. China. liguobao@pku.edu.cn.
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, P. R. 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, P. R. China. Jhlin@pku.edu.cn.
authors.forename: Jianhua
authors.initials: J
authors.lastname: Lin
keywords: antiferromagnetic ordering; multiferroicity; neutron diffraction; phase diagrams; self-doping