|
|||||
|
|
Magnetic properties of the charge ordered Nd0.75Na0.25MnO3 |
|
| Authors: | ZQ Li XH Zhang XJ Liu WB Mi XN Jing |
| Institution: | a Department of Applied Physics, Institute of Advanced Materials Physics, School of Science, Tianjin University, Naikai District, Weijin Road No. 92, Tianjin 300072, China b Key Laboratory for Advanced Ceramics and Machining Technology of Ministry of Education, Tianjin University, Tianjin 300072, China c Institute of Physics, CAS, Beijing 100080, China |
| Abstract: | Nd0.75Na0.25MnO3 polycrystalline ceramic is prepared via sol-gel process and its magnetic properties and electron spin resonance (ESR) spectra have been investigated experimentally. As the compound is cooled from room temperature, a charge-ordered state first develops below 170 K. A high magnetic field melts the charge ordered state and stabilizes a ferromagnetic (FM) state below 170 K. A field induced transition, analogous to a spin flip transition, is observed between 40 and 170 K. The critical temperature for spin flip increases with increasing temperature. Below 130 K, the compound tends to be intrinsically inhomogeneous, i.e. FM clusters and paramagnetic domains coexist in this system at least, which is confirmed by ESR measurements. When the external magnetic field is zero, long range FM interaction is not developed in this system; however, a tendency of re-entrant FM transition is observed in this compound. |
| Keywords: | 75 47 Lx 75 47 Gk 76 30 &minus v 75 30 Kz |
| 本文献已被 ScienceDirect 等数据库收录！ | |