Room-temperature polarization switching and antiferromagnetic coupling in epitaxial (Ga,Fe)2O3/SrRuO3 heterostructures
- 등재 SCIE, SCOPUS
- 발행기관 American Institute of Physics Inc.
- 발행년도 2015
- 총서유형 Journal
- URI http://www.dcollection.net/handler/ewha/000000115446
- 본문언어 영어
- Published As http://dx.doi.org/10.1063/1.4917249
초록/요약
Room-temperature reversible remnant polarization of gallium ferrite thin-films is reported as a multiferroic material with non-zero order parameters of polarization and magnetization. With the addition of Fe ions in Ga sites, Ga0.6Fe1.4O3 (GFO) thin films have been considered as potentially promising of multiferroicity. The b-axis oriented epitaxial GFO films were grown on SrRuO3(111)/SrTiO3(111). The six-fold symmetric in-plane epitaxy of the GFO films was confirmed using X-ray diffraction. The magnetic moment of the films was measured as a function of temperature and external magnetic field, which shows a room-temperature non-zero magnetization. Macroscopic and microscopic methods have been applied to demonstrate the polarization switching of the films. The remnant polarization is measured as 0.05 μC/cm2. Reduction of leaky behaviors of the GFO films owing to the conducting oxide of SrRuO3 will pave a way to take advantage of the room-temperature non-zero multi-orders for future non-volatile memory device applications. © 2015 AIP Publishing LLC.
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