化学替代对Cu2OSeO3中的斯基米安相的影响
Paul M Neves1,2, Dustin A Gilbert1,3, Sheng Ran1,2
1National Institute of Standards and Technology Center for Neutron Research, Gaithersburg, Maryland 20878, USA.
Physical review. B
|September 21, 2023
概括
在Cu2OSeO3中的化学替代稳定了磁性斯基米安相,扩大了它们的温度范围. 这项研究探讨了如何改变材料.
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
- 磁力学 磁力学 是一种
背景情况:
- 磁性 skyrmions 是被拓保护的准粒子,具有独特的特性.
- Cu2OSeO3是一种罕见的绝缘多铁基材料,表现出 skyrmion 阶段.
- 之前的研究表明,化学替代影响了Cu2OSeO3.3中的 skyrmion 阶段.
研究的目的:
- 为了研究化学替代 (Zn,Ag,S) 对Cu2OSeO3.3.的磁相图的影响.
- 确定这些替代物如何影响斯基米昂相的稳定性和特征.
- 为了比较磁力测量和小角度中子散射 (SANS) 的结果,以表征替代材料.
主要方法:
- 化学替代 Zn,Ag 和 S 形成粉状 Cu2OSeO3.3.
- 磁力测量测量以表征磁性属性.
- 小角度中子散射 (SANS) 探测磁结构和相变.
主要成果:
- Ag和S的替代物稳定了在扩大温度范围的斯基米翁阶段.
- SANS数据澄清了Zn替代样本中的高温相,确定一个是skyrmionic,另一个是潜在的螺旋.
- 中子散射表明,化学替代通常会削弱螺旋和螺旋磁顺序.
结论:
- 化学替代是一种有效的方法,用于调整绝缘多铁材料中的斯基米安相稳定性.
- 这项研究提供了更详细的了解替代Cu2OSeO3.3的磁相图.
- 在Zn替代样本中,磁力测量和SANS之间的差异凸显了补充性特征技术的重要性.
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