|
|||||
|
|
Electronic and magnetic properties of layered LnFePO (Ln=La and Ce) |
|
| Authors: | Yoichi Kamihara Hidenori Hiramatsu Hiroshi Yanagi Hideo Hosono |
| Institution: | a ERATO-SORST, Japan Science and Technology Agency, Frontier Research Center, Tokyo Institute of Technology, Mail Box S2-13, Build S2-6F East, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan b Materials and Structures Laboratory, Tokyo Institute of Technology, Mail Box R3-4, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan c Frontier Research Center, Tokyo Institute of Technology, Mail Box S2-13, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan |
| Abstract: | Effects of the replacement of La with Ce on the electronic and magnetic properties of a layered superconductor LaFePO (Tc=∼5 K) were studied. Polycrystalline samples of CeFePO, prepared by a solid-state reaction, showed metallic conduction down to 2 K without exhibiting superconducting transition, although the resistivity decreased largely at temperatures below 30 K. Further, they showed an apparent positive magnetoresistance (MR) below ∼2 K, superposed on a negative MR. Temperature dependence of magnetic susceptibility is decomposed to a temperature-sensitive Curie-Weiss component presumably due to the Ce3+ ions with a magnetic moment of 1.98μB and a less temperature-sensitive component attributable to itinerant electrons. The magnetic interaction between Ce3+ ions and itinerant electrons in CeFePO likely suppresses the superconducting transition observed in LaFePO. |
| Keywords: | A Superconductors A Magnetic materials A Inorganic compounds D Electrical conductivity D Magnetic properties |
| 本文献已被 ScienceDirect 等数据库收录！ | |