| 題名: | Magnetic phase diagram of Nd0.5Ca0.5-ySryMnO3 |
| 作者: | Kumary, T. Geetha
Cheng, S. L.
Lin, J. G.
Chiang, Wen-C. |
| 貢獻者: | 物理系 |
| 關鍵詞: | COLOSSAL MAGNETORESISTANCE
MANGANITES
ND0.5CA0.5MNO3
TRANSITIONS
CHARGE
ORDER |
| 日期: | 2007 |
| 上傳時間: | 2009-11-13 14:54:03 (UTC+8) |
| 摘要: | The phase diagram obtained for Nd0.5Ca0.5-ySryMnO3 from the temperature dependent magnetization and electron spin resonance measurements are presented in this paper. It is found from magnetization measurements that y=0.25 is a critical point where a magnetic transformation occurs, accompanied by a nonmonotonic variation in the c lattice parameter. Below a certain transition temperature, compounds with y < 0.25 exhibit charge ordering and those with y >= 0.25 show ferromagnetic ordering. An antiferromagnetic transition occurs for y=0 at still lower temperatures whereas a phase separation into antiferromagnetically and ferromagnetically ordered states occurs for 0 < y <= 0.5. Electron spin resonance analysis shows that the phase separation occurs at temperatures above the ferromagnetic transition temperature in all the compounds with y > 0. (C) 2007 American Institute of Physics. |
| 關聯: | JOURNAL OF APPLIED PHYSICS Volume: 101 Issue: 9 Article Number: 093910 |
| 顯示於類別: | [光電物理系] 期刊論文
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