TY - GEN
T1 - Control of ferroelectric phases by 4f magnetic moments in multiferroic RMnO3 crystals
AU - Kuwahara, H.
AU - Noda, K.
AU - Akaki, M.
AU - Nakamura, F.
AU - Akahoshi, D.
PY - 2006
Y1 - 2006
N2 - We have investigated the magnetoelectric (ME) properties of the orthorhombic RMnO3 (R=mixed rare earth ions) crystals with and without the 4/magnetic moments, while keeping an average ionic size of R. In the presence of the magnetic contribution from the R ions ((Eu,Ho)MnO3), we have observed the ferroelectric polarization along the c axis (P c) in a zero field, which arises from the bc spiral structure stabilized by the anisotropic exchange interaction between the R and Mn sublattices like TbMnO3. The Pc phase can be transferred to Pa by application of fields of ∼1.5 T parallel to the b axis. The observed decrease of transition field compared with TbMnO3 suggests that the magnetic contribution and the local distortion of the R ions are key factors for governing the ME properties.
AB - We have investigated the magnetoelectric (ME) properties of the orthorhombic RMnO3 (R=mixed rare earth ions) crystals with and without the 4/magnetic moments, while keeping an average ionic size of R. In the presence of the magnetic contribution from the R ions ((Eu,Ho)MnO3), we have observed the ferroelectric polarization along the c axis (P c) in a zero field, which arises from the bc spiral structure stabilized by the anisotropic exchange interaction between the R and Mn sublattices like TbMnO3. The Pc phase can be transferred to Pa by application of fields of ∼1.5 T parallel to the b axis. The observed decrease of transition field compared with TbMnO3 suggests that the magnetic contribution and the local distortion of the R ions are key factors for governing the ME properties.
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U2 - 10.1557/proc-0966-t06-02
DO - 10.1557/proc-0966-t06-02
M3 - Conference contribution
AN - SCOPUS:41149152981
SN - 9781604234183
T3 - Materials Research Society Symposium Proceedings
SP - 34
EP - 39
BT - Ferroelectrics and Multiferroics
PB - Materials Research Society
T2 - 2006 MRS Fall Meeting
Y2 - 27 November 2006 through 29 November 2006
ER -