Materials Reports 2019, Vol. 33 Issue (z1): 108-111 |
INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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Effect of Ni Doping on the Crystal Structure and Magnetic Properties of BiFeO3 Films |
ABLAT Gulnigar, MAIMAITI Maihemuti, SALAMU Abidiguli, MAMAT Mamatrishat, WU Zhaofeng, SUN Yanfei
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School of Physics and Technology, Xinjiang University, Urumqi 830046 |
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Abstract The multiferroic BiFeO3 (BiFe1-xNixO3, x=0, 0.05, 0.10, and 0.15) films have been prepared on silicon substrates by the sol-gel method. The effects of Ni on BiFeO3 crystal structure, surface morphology, optical properties and magnetic properties were investigated. X-ray diffraction spectra indicated that Ni substitution changed the crystal structure of the BiFe1-xNixO3 system from rhombohedral to tetragonal phase. Scanning electron microscopy (SEM) showed that Ni doping can improve the crystallinity of BiFe1-xNixO3 films. Raman spectra revealed that pure BFO have strong vibration peaks. However, with the increase of Ni doping, the Raman peaks was redshifted. The result indicated that Ni doping reduced the distance between Bi-O atoms in BiFeO3 thin films. Compared with BiFeO3 film, the saturation magnetization (Ms) of BiFe1-x-NixO3 (x=0.05, 0.1 and 0.15) films was significantly enhanced, which indicated that the increase of Ni content inducing more structure distortion and thus suppressing cycloid spin structure in BiFe1-xNixO3 films. Our result may provide potential applications in information storage.
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Published: 05 July 2019
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About author:: Gulnigar Ablat received her B.S. degree in physics from Xinjiang University in 2016. She is currently pursuing her Master’s degree at Xinjiang University under the supervision of associate Prof. Mamat Mamatrishat. Her research has focused on materials physics.Mamatrishat Mamat received his B.E. and M.S degrees in physics from Xinjiang University in 1998 and 2002, and received his Ph.D. degree in applied phy-sics and microelectronics from Tokyo Institute of Technology, in 2012. From 2017.9 to 2018.7, visited physics department of Zhejiang University, he is currently an associate professor in Xinjiang University. His research interests are material physics and condensed matter physics, published research works on journals of Microelectronics and Reliability, Vacuum, Semiconductor Science and Techno-logy, Superlattices and Microstructures, Solid State Communications, and Applied Surface Science, Materials Letters. |
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