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 t...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.展开更多
基金supported by the National Natural Science Foundation of China(Nos.11174217 and 10904110)
文摘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.
