| Hua-rui Liu,Min Li,Peng Sun,Shi-qi Wang,Xin Jin,Xian-ke Sun,Yu-kai An,Ji-wen Liu.Room temperature ferromagnetism of nonmagnetic element Ca-doped LiNbO3 films[J].Optoelectronics Letters,2014,10(2):115-118 |
| Room temperature ferromagnetism of nonmagnetic element Ca-doped LiNbO3 films |
| Author Name | Affiliation | E-mail | | Hua-rui Liu | Tianjin Key Laboratory for Photoelectric Materials and Devices, School of Material Science and Engineering, Tianjin University of Technology, Tianjin, 300384, China | | | Min Li | Tianjin Key Laboratory for Photoelectric Materials and Devices, School of Material Science and Engineering, Tianjin University of Technology, Tianjin, 300384, China | | | Peng Sun | Tianjin Key Laboratory for Photoelectric Materials and Devices, School of Material Science and Engineering, Tianjin University of Technology, Tianjin, 300384, China | | | Shi-qi Wang | Tianjin Key Laboratory for Photoelectric Materials and Devices, School of Material Science and Engineering, Tianjin University of Technology, Tianjin, 300384, China | | | Xin Jin | Tianjin Key Laboratory for Photoelectric Materials and Devices, School of Material Science and Engineering, Tianjin University of Technology, Tianjin, 300384, China | | | Xian-ke Sun | Tianjin Key Laboratory for Photoelectric Materials and Devices, School of Material Science and Engineering, Tianjin University of Technology, Tianjin, 300384, China | | | Yu-kai An | Tianjin Key Laboratory for Photoelectric Materials and Devices, School of Material Science and Engineering, Tianjin University of Technology, Tianjin, 300384, China | ayk_bj@126.com | | Ji-wen Liu | Tianjin Key Laboratory for Photoelectric Materials and Devices, School of Material Science and Engineering, Tianjin University of Technology, Tianjin, 300384, China | jwliu@tjut.edu.cn |
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| Abstract: |
| The nonmagnetic element Ca-doped LiNbO3 films were prepared on Si (111) substrates by radio frequency (RF) magnetron sputtering technique. X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) indicate that the Ca atoms enter the LiNbO3 lattice in the form of Ca2+ ions. Superconducting quantum interference device (SQUID) results show that the Ca-doped LiNbO3 films have room-temperature ferromagnetism and a maximum saturation magnetization of 4800 A/m at the 3% of Ca atom doping concentration. The room temperature ferromagnetism of the Ca-doped LiNbO3 films can be attributed to the occurrence of vacancies due to Ca doping and is the intrinsic property. |
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| This work has been supported by the National Natural Science Foundation of China （Nos.11174217 and 10904110）, |
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