在La和Ru被杂的Sr2IrO4中引人入胜的磁和电子行为
B Dundi Sri Chandana1, Jeetendra Kumar Tiwari2, K Saranya1
1Department of Physics, School of Basic and Applied Sciences, Central University of Tamil Nadu, Neelakudi, Thiruvarur 610005, Tamil Nadu, India.
Journal of physics. Condensed matter : an Institute of Physics journal
|December 31, 2024
概括
这项研究研究了La和Ru的联合化 (Sr1-La) 2Ir1-RuO4,揭示了在低化时过渡到弱铁磁性和重新进入的自旋玻璃行为. 更高的兴奋剂抑制了自旋玻璃相,同时保持了铁磁性,影响了电气性能.
科学领域:
- 凝聚物质物理学 凝聚物质物理学
- 材料科学 材料科学 材料科学
- 固态化学 固态化学
背景情况:
- 二氧化 (Sr2IrO4) 由于强烈的旋转轨道合,具有独特的电子和磁性.
- 兴奋剂是调整这些特性的一个关键策略,但理解多种兴奋剂的相互作用是复杂的.
研究的目的:
- 实验性地研究La和Ru联合合的Sr2IrO4.4的结构性,磁性和电性.
- 阐明不同剂度对磁性排序和电荷传输机制的影响.
主要方法:
- 用于结构分析的X射线衍射 (XRD).
- 射线光电子光谱 (XPS) 用于确定的电荷状态.
- 测量直流和交流磁性易感度,以探测磁性转换和排序.
- 电阻测量用于分析电荷传输.
主要成果:
- 与La和Ru的联合合保持了四角形结构,改变了格子参数和结合角度/长度.
- 低剂量兴奋剂 (x=0.05) 诱导弱铁磁性 (wFM) 和回入式自旋玻璃 (RSG) 行为,与抗铁磁性 (AFM) 相互作用共存.
- 更高的兴奋剂 (x=0.15) 抑制RSG阶段,只留下wFM阶段,同时显著减少磁矩.
- 电阻表现出半导体/绝缘性行为,导电由2D Mott的可变范围跳跃控制,电阻在较高的兴奋剂中显著增加.
结论:
- 在Sr2IrO4中配合La和Ru产生竞争性的磁性和跳跃过程.
- 剂的度极大地影响了自旋玻璃相的出现和抑制,影响了磁性排序.
- 这项研究突出了通过多部位兴奋剂调整 iridates 中复杂的磁性和电子行为的潜力.
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