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Hexagonal Lu 1- x In x FeO 3 Room-Temperature Multiferroic Thin Films.
- Source :
-
ACS applied materials & interfaces [ACS Appl Mater Interfaces] 2022 Nov 23; Vol. 14 (46), pp. 52117-52123. Date of Electronic Publication: 2022 Nov 08. - Publication Year :
- 2022
-
Abstract
- The hexagonal rare earth ferrites h -RFeO <subscript>3</subscript> (R = rare earth element) have been recognized as promising candidates for a room-temperature multiferroic system, and the primary issue for these materials is how to get a stable hexagonal structure since the centrosymmetric orthorhombic structure is generally stable for most RFeO <subscript>3</subscript> at room-temperature, while the hexagonal phase is only stable under some strict conditions. In the present work, h -Lu <subscript>1- x </subscript> In <subscript> x </subscript> FeO <subscript>3</subscript> ( x = 0-1) thin films were prepared on a Nb-SrTiO <subscript>3</subscript> (111) single-crystal substrate by a pulsed laser deposition (PLD) process, and the multiferroic characterization was performed at room temperature. With the combined effects of chemical pressure and epitaxial strain, the stable hexagonal structure was achieved in a wide composition range ( x = 0.5-0.7), and the results of XRD (X-ray diffraction) and SAED (selected area electron diffraction) indicate the super-cell match relations between the h -Lu <subscript>0.3</subscript> In <subscript>0.7</subscript> FeO <subscript>3</subscript> thin film and substrate. The saturated P - E hysteresis loop was obtained at room temperature with a remanent polarization of about 4.3 μC/cm <superscript>2</superscript> , and polarization switching was also confirmed by PFM measurement. Furthermore, a strong magnetoelectric coupling with a linear magnetoelectric coefficient of 1.9 V/cm Oe was determined, which was about three orders of magnitude larger than that of h -RFeO <subscript>3</subscript> ceramics. The present results indicate that the h -Lu <subscript>1- x </subscript> In <subscript> x </subscript> FeO <subscript>3</subscript> thin films are expected to have great application potential for magnetoelectric memory and detection devices.
Details
- Language :
- English
- ISSN :
- 1944-8252
- Volume :
- 14
- Issue :
- 46
- Database :
- MEDLINE
- Journal :
- ACS applied materials & interfaces
- Publication Type :
- Academic Journal
- Accession number :
- 36346358
- Full Text :
- https://doi.org/10.1021/acsami.2c11927