拉胺对多铁基BiFeO3中的结构和环状旋转排序的影响
Tomasz Pikula1, Karolina Siedliska1, Tadeusz Szumiata2
1Department of Electronics and Information Technology, Lublin University of Technology, Nadbystrzycka 38A, Lublin, 20-618, Poland.
概括
在木铁 (BiFeO3) 中的兰兴奋剂改变了晶体结构和磁性. 增加的度会破坏环状旋转的排序,并增强磁化,揭示新的结构阶段.
科学领域:
- 材料科学 材料科学 材料科学
- 固态物理 固态物理
- 晶体学 晶体学是指结晶学.
背景情况:
- 木铁矿 (BiFeO3) 是一种具有潜在应用的多铁材料.
- 了解兴奋剂对其结构和磁性性能的影响对于材料设计至关重要.
- 兰 (La) 兴奋剂正在探索调整BiFeO3.3的特性.
研究的目的:
- 为了合成和描述Bi1-xLaxFeO3样本.
- 为了研究度对相位形成,微观结构和环状旋转顺序的影响.
- 探索新的结构阶段的出现及其与磁性特性的相关性.
主要方法:
- 合成Bi1-xLaxFeO3的Sol-gel方法 (0.00 ≤ x ≤ 0.30). 这是一个非常好的方法.
- 用于相位分析的X射线衍射 (XRD).
- 扫描电子显微镜 (SEM) 用于微观结构的研究.
- 莫斯巴乌尔光谱仪用于研究环状旋转顺序和不和性.
主要成果:
- 随着La度的增加而观察到的结构转变:方圆形R3c → R3c + 立方形Pm3m → R3c + Pm3m + 正方形Pbam.
- 在Bi1-xLaxFeO3.3中首次观察到Pbam阶段及其相关的多孔微结构.
- 随着La含量增加,环状旋转顺序减少 (在x = 0.30时消失),其无和度从0.5变为0.1.1.
- 在结构过渡点 (x = 0.07) 观察到磁化显著增加.
结论:
- 兰兴奋剂有效地改变了BiFeO3.3的晶体结构和微观结构.
- 环状旋转序列的消失和新阶段的出现与增强的磁化有关.
- 这项研究揭示了La-doped bismuth ferrite的新型结构阶段和磁性行为,为未来的应用提供了洞察力.
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