在LaMnO3矿中Mg替代对其结构完整性和磁性行为的影响
Parvathy Namboothiri1,2, Vishnumaya K J1, Phuong V Pham3
1Polymers and Functional Materials Department, CSIR-Indian Institute of Chemical Technology Hyderabad-500007 India mvas@iict.res.in vasu.mutta@gmail.com.
RSC advances
|March 20, 2025
概括
在LaMnO3中的替代影响其结构和磁性. 较高的含量引入了二次阶段,降低了过渡温度,并由于共存的磁顺序引起了负磁化.
科学领域:
- 材料科学 材料科学 材料科学
- 固态化学 固态化学
- 磁力学 磁力学 是一种
背景情况:
- LaMnO3 是矿矿中的一个关键材料,具有有趣的磁性和电子性质.
- 兴奋剂研究对于调整这些材料的性能以应用于潜在应用至关重要.
研究的目的:
- 为了研究 (Mg) 替代在La位点在LaMnO3.3中的影响.
- 系统地分析不同度的结构,化学和磁性特性变化.
主要方法:
- 通过传统的固态反应合成La1-xMgxMnO3 (x = 0.050.33).
- 用于结构分析的X射线衍射 (XRD).
- 磁性测量包括零场冷却 (ZFC) 和场冷却 (FC) 磁化,以及异热歇斯底里循环.
主要成果:
- 观察到纯体结构x = 0.15;一个二次的MgMn2O4旋转相出现x>0.15,增加与Mg含量.
- 磁过渡温度随着含量增加而下降,所有低于200K.
- 在ZFC曲线中观察到x>0.2的负磁化,归因于两个相的存在,并且在含Mg含量较高的样本中突出.
- 在x > 0.15时铁磁和铁磁排序的共存,而在x < 0.15时铁磁排序的持续.
结论:
- 替代显著改变了LaMnO3.3的结构和磁性特性.
- MgMn2O4阶段的出现会影响磁性行为,导致复杂的磁性排序和负磁化等现象.
- 这项研究强调了通过异构合剂的化方法来调整LaMnO3的特性.
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