Room temperature ferromagnetism of nonmagnetic element Ca-doped LiNbO3 films

• 来源期刊: 光电子快报（英文版）
• 年，卷（期）: 2014,（2）
• 页码范围: 115-118
• 页数: 4页
• 语种: 英文
• DOI: 10.1007/s11801-014-3225-5

摘要

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) resuits 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.