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Multiferroic phase diagram of E -type RMnO3 films studied by neutron and x-ray diffraction
DOI:
10.1103/PhysRevB.98.174416
Authors:
Saumya
Mukherjee
(Diamond Light Source; Paul Scherrer Institut)
,
Kenta
Shimamoto
(Paul Scherrer Institut)
,
Yoav William
Windsor
(Swiss Light Source)
,
Mahesh
Ramakrishnan
(Swiss Light Source)
,
Sergii
Parchenko
(Swiss Light Source)
,
Urs
Staub
(Swiss Light Source)
,
Laurent
Chapon
(Diamond Light Source; Institut Laue-Langevin)
,
Bachir
Ouladdiaf
(Institut Laue-Langevin)
,
Marisa
Medarde
(Paul Scherrer Institut)
,
Tian
Shang
(Paul Scherrer Institut; Swiss Light Source)
,
Elisabeth A.
Müller
(Paul Scherrer Institut)
,
Michel
Kenzelmann
(Paul Scherrer Institut)
,
Thomas
Lippert
(ETH Zürich; Paul Scherrer Institut)
,
Christof W.
Schneider
(Paul Scherrer Institut)
,
Christof
Niedermayer
(Paul Scherrer Institut)
Co-authored by industrial partner:
No
Type:
Journal Paper
Journal:
Physical Review B
, VOL 98
State:
Published (Approved)
Published:
November 2018
Abstract: We present a generalized multiferroic phase diagram for orthorhombic RMnO3(R=Gd–Lu) based on coherently grown thin films. The magnetic order was identified by neutron-diffraction and resonant soft x-ray scattering experiments. For large R-ions (R=Gd–Dy), the transition temperature to a long-range ordered antiferromagnetic phase is only weakly dependent on the R-ion radius, but decreases monotonically with decreasing R-ion radius for films with R=Ho–Lu. The antiferromagnetic phase is characterized by an incommensurate order of the Mn3+ spins, which successively locks into a commensurate E-type state. These findings confirm a uniform multiferroic ground state independent of the R ion and are in excellent agreement with predicted properties of strain-induced multiferroicity in these materials. In particular, strong variation of multiferroic properties in these epitaxial films compared to bulk highlights the tuning ability of strain.
Journal Keywords: Antiferromagnetism; Dielectric properties; Ferroelectricity; Magnetic interactions; Magnetic order parameter; Magnetic phase transitions; Magnetoelectric effect; Multiferroics; Neutron diffraction; X-ray diffraction
Diamond Keywords: Antiferromagnetism; Ferroelectricity
Subject Areas:
Physics
Facility: X11MA at SLS
Added On:
14/11/2018 10:52
Discipline Tags:
Surfaces
Quantum Materials
Multiferroics
Physics
Hard condensed matter - structures
Magnetism
Materials Science
interfaces and thin films
Technical Tags: