研究目的
To propose a device design for efficient voltage control of magnetism by manipulating the magnetization of a ferrimagnetic double perovskite through an exchange coupled layer of multiferroic BiFeO3.
研究成果
The study concludes that while single layers of BBFO and SFMO show high quality, the fabrication of a stable bilayer is challenging due to the decomposition of the first layer during the deposition of the second layer. This underscores the importance of selecting constituent materials with compatible growth conditions for the development of artificial multiferroic stacks.
研究不足
The decomposition of the first layer during the deposition of the second layer due to differing growth conditions for BiFeO3 and Sr2FeMoO6 limits the realization of a stable bilayer. The study highlights the challenge in fabricating such bilayers and the need for careful material selection.
1：Experimental Design and Method Selection:
The study involves the preparation of bilayers of Barium doped BiFeO3 (BBFO) and ferrimagnetic double perovskite Sr2FeMoO6 (SFMO) by pulsed laser deposition (PLD) to explore strong interlayer exchange coupling.
2：Sample Selection and Data Sources:
Single layers of BBFO and SFMO were deposited on SrTiO3 (STO) substrates. The structural and magnetic properties of these layers were analyzed.
3：List of Experimental Equipment and Materials:
A Compex Pro 205 KrF excimer laser was used for PLD. Structural properties were analyzed using a Bruker D8 four circle diffractometer, magnetic properties with a Quantum Design SQUID magnetometer, and surface morphology with a Digital Instruments 3100 Dimensions AFM.
4：Experimental Procedures and Operational Workflow:
BBFO and SFMO layers were deposited under optimized conditions for each material. The layers were characterized for crystallinity, surface roughness, and magnetic properties.
5：Data Analysis Methods:
X-ray diffraction patterns were simulated using CADEM software. Magnetic properties were analyzed from SQUID measurements, and surface morphology was assessed via AFM and SEM.
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