TY - JOUR
KW - Design
KW - Automation
KW - Film
KW - Magnetic field
KW - Iron
KW - Room temperature
KW - Transition temperature
KW - Oxygen
KW - Density functional theory
KW - Magnetism
KW - Electronic equipment
KW - Electric field
KW - Article
KW - Priority journal
KW - Neutron diffraction
KW - Ferric oxide
KW - Lutetium
KW - Iron oxide
KW - Magnetic property
KW - Temperature profile
KW - Neutron scattering
AU - J.A Mundy
AU - C.M Brooks
AU - M.E Holtz
AU - J.A Moyer
AU - H Das
AU - A.F Rébola
AU - J.T Heron
AU - J.D Clarkson
AU - S.M Disseler
AU - Z Liu
AU - A Farhan
AU - R Held
AU - R Hovden
AU - E Padgett
AU - Q Mao
AU - H Paik
AU - R Misra
AU - L.F Kourkoutis
AU - E Arenholz
AU - A Scholl
AU - J.A Borchers
AU - W.D Ratcliff
AU - Ramamoorthy Ramesh
AU - C.J Fennie
AU - P Schiffer
AU - D.A Muller
AU - D.G Schlom
AB - Materials that exhibit simultaneous order in their electric and magnetic ground states hold promise for use in next-generation memory devices in which electric fields control magnetism. Such materials are exceedingly rare, however, owing to competing requirements for displacive ferroelectricity and magnetism. Despite the recent identification of several new multiferroic materials and magnetoelectric coupling mechanisms, known single-phase multiferroics remain limited by antiferromagnetic or weak ferromagnetic alignments, by a lack of coupling between the order parameters, or by having properties that emerge only well below room temperature, precluding device applications. Here we present a methodology for constructing single-phase multiferroic materials in which ferroelectricity and strong magnetic ordering are coupled near room temperature. Starting with hexagonal LuFeO 3 - the geometric ferroelectric with the greatest known planar rumpling - we introduce individual monolayers of FeO during growth to construct formula-unit-thick syntactic layers of ferrimagnetic LuFe 2 O 4 (refs 17, 18) within the LuFeO 3 matrix, that is, (LuFeO 3) m /(LuFe 2 O 4) 1 superlattices. The severe rumpling imposed by the neighbouring LuFeO 3 drives the ferrimagnetic LuFe 2 O 4 into a simultaneously ferroelectric state, while also reducing the LuFe 2 O 4 spin frustration. This increases the magnetic transition temperature substantially - from 240 kelvin for LuFe 2 O 4 (ref. 18) to 281 kelvin for (LuFeO 3) 9 /(LuFe 2 O 4) 1. Moreover, the ferroelectric order couples to the ferrimagnetism, enabling direct electric-field control of magnetism at 200 kelvin. Our results demonstrate a design methodology for creating higher-temperature magnetoelectric multiferroics by exploiting a combination of geometric frustration, lattice distortions and epitaxial engineering. © 2016 Macmillan Publishers Limited, part of Springer Nature. All rights reserved.
BT - Nature
DO - 10.1038/nature19343
LA - eng
M1 - 7621
N1 - cited By 129
N2 - Materials that exhibit simultaneous order in their electric and magnetic ground states hold promise for use in next-generation memory devices in which electric fields control magnetism. Such materials are exceedingly rare, however, owing to competing requirements for displacive ferroelectricity and magnetism. Despite the recent identification of several new multiferroic materials and magnetoelectric coupling mechanisms, known single-phase multiferroics remain limited by antiferromagnetic or weak ferromagnetic alignments, by a lack of coupling between the order parameters, or by having properties that emerge only well below room temperature, precluding device applications. Here we present a methodology for constructing single-phase multiferroic materials in which ferroelectricity and strong magnetic ordering are coupled near room temperature. Starting with hexagonal LuFeO 3 - the geometric ferroelectric with the greatest known planar rumpling - we introduce individual monolayers of FeO during growth to construct formula-unit-thick syntactic layers of ferrimagnetic LuFe 2 O 4 (refs 17, 18) within the LuFeO 3 matrix, that is, (LuFeO 3) m /(LuFe 2 O 4) 1 superlattices. The severe rumpling imposed by the neighbouring LuFeO 3 drives the ferrimagnetic LuFe 2 O 4 into a simultaneously ferroelectric state, while also reducing the LuFe 2 O 4 spin frustration. This increases the magnetic transition temperature substantially - from 240 kelvin for LuFe 2 O 4 (ref. 18) to 281 kelvin for (LuFeO 3) 9 /(LuFe 2 O 4) 1. Moreover, the ferroelectric order couples to the ferrimagnetism, enabling direct electric-field control of magnetism at 200 kelvin. Our results demonstrate a design methodology for creating higher-temperature magnetoelectric multiferroics by exploiting a combination of geometric frustration, lattice distortions and epitaxial engineering. © 2016 Macmillan Publishers Limited, part of Springer Nature. All rights reserved.
PB - Nature Publishing Group
PY - 2016
SP - 523
EP - 527
T2 - Nature
TI - Atomically engineered ferroic layers yield a room-temperature magnetoelectric multiferroic
VL - 537
SN - 00280836
ER -