结构,光学和磁性行为以及在 (Ca,V) 化 ZnO 纳米粒子中的格里菲斯相似相的核化
S Mrabet1, N Ihzaz1, M N Bessadok1
1Laboratory of Physics of Materials and Nanomaterials Applied at Environment (LaPhyMNE), Faculty of Sciences in Gabes, Gabes University, 6072 Gabes, Tunisia. nejib.ihzaz@issatgb.rnu.tn.
Dalton transactions (Cambridge, England : 2003)
|April 14, 2025
概括
和联合的氧化纳米粒子表现出可调节的磁性特性. 观察到一种新的格里菲斯相似阶段,这表明这些联合化ZnO纳米粒子中的反铁磁和铁磁相互作用之间的相互作用.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
- 凝聚物质物理学 凝聚物质物理学
背景情况:
- 氧化 (ZnO) 是一种多功能半导体,在电子和自旋电子学中具有应用.
- 用过渡金属合ZnO可以诱导新的磁性和光学性质.
- 了解辅助兴奋剂的影响对于定制材料功能至关重要.
研究的目的:
- 为了合成和表征单相 (Ca,V) 联合化ZnO纳米粒子 (ZCVO).
- 研究ZCVO纳米颗粒的结构,光学和磁性特性.
- 探索共兴系统内的磁性相位过渡和相互作用.
主要方法:
- 改进的sol-gel方法用于纳米粒子合成.
- 用瑞特维尔德精细化进行结构分析的X射线衍射 (XRD).
- 传输电子显微镜 (TEM) 用于形态学.
- 光发光 (PL),紫外线和拉曼光谱用于光学和晶体质量评估.
- 磁化温度 (M-T) 和磁化磁场 (M-H) 测量用于磁性表征.
主要成果:
- 单相六角石 ZnO纳米粒子 (ZCVO) 在没有二次相的情况下成功合成.
- 联合兴奋剂影响了光带间隙和晶体质量.
- 通过可调节的磁合,观察到对磁性 (PM) 和铁磁性 (FM) 阶段的证据.
- 格里菲斯相似的阶段首次被观察到在联合化ZnO纳米颗粒中,归因于竞争的AFM和FM相互作用和氧气缺乏.
结论:
- 合成的ZCVO纳米颗粒具有单相六边形的石结构.
- 与Ca和V联合合导致可调节的磁性属性和不同的磁相.
- 在ZCVO纳米颗粒中观察到的格里菲斯样相是一个新发现,可能来自Ca和V离子的磁相互作用和氧空缺的相互作用.
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