Abstract
The phase stability, ferroelectricity, and magnetism of highly crystalline epitaxial ϵ-Fe2O3 films deposited on SrTiO3(111) substrates are reported. Temperature-dependent x-ray diffraction measurements revealed that α-Fe2O3 appeared as a secondary phase after samples were annealed up to 1000 °C. A clear saturated and opened polarization-electric field hysteresis loop with the remnant polarization ∼2.6 μC cm-2 and coercive electric field ∼100 kV cm-1 was obtained at room temperature using a conventional ferroelectric measurement technique. The magnetic phase transition was observed at 155 K. Magnetization-magnetic field measurements revealed that magnetic softening via the phase transition accompanied a reduction in the coercive field from 10 to 6.8 kOe, which is smaller than the coercive field reduction previously observed for ϵ-Fe2O3 nanoparticles.
Original language | English |
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Article number | 182904 |
Journal | Applied Physics Letters |
Volume | 119 |
Issue number | 18 |
DOIs | |
Publication status | Published - 2021 Nov 1 |
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)