Mn 的温度依赖的结构性质1.90M0.10O3(M = Cr 和 Fe)
Mohit Chandra1, Satish Yadav1, Rajeev Rawat1
1UGC-DAE Consortium for Scientific Research, University Campus, Khandwa Road, Indore 452001, India.
Journal of physics. Condensed matter : an Institute of Physics journal
|November 16, 2023
概括
在氧化 (Mn2O3) 中的和铁的替代将结构转换到较低的温度,并影响磁性. 这些替代也诱导了与Mn1.90Cr0.10O3.3的铁电排序相关的对称性变化.
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:
- 氧化 (Mn2O3) 具有复杂的磁性和结构性质,包括反铁磁性转变和立方到正方形的结构转变.
- 研究将其他过渡金属替代到Mn2O3网格中的效应对于理解结构-属性关系至关重要.
研究的目的:
- 研究 (Cr) 和铁 (Fe) 替代物对Mn2O3.3的磁性和结构性质的影响.
- 为了确定Mn1.90Cr0.10O3 (MCO) 和Mn1.90Fe0.10O3 (MFO) 多晶样品中的温度依赖的磁性和结构转换.
主要方法:
- 合成了MCO和MFO的多晶样品.
- 进行了温度依赖的磁性测量.
- 同步射线X射线粉末衍射 (SXRD) 用于在室温和温度范围内的结构分析.
主要成果:
- 在室温下,MCO和MFO样本都以立方对称的形式结晶.
- 和铁的替代物显著影响Mn2O3.3.的磁性和结构性质.
- 两个替代样本都表现出两个反铁磁过渡,类似于原始的Mn2O3,发生在约77K/80K和40K左右.
- 与原始的Mn2O3 (~310 K) 相比,立方到正方体结构过渡温度转移到较低的值 (MCO大约240 K,MFO大约260 K).
- 在MCO的铁电排序温度下,观察到从中心对称的Pcab到非中心对称的Pca2的对称性变化.
结论:
- 替代Cr和Fe有效地改变了Mn2O3.3.的磁性和结构性行为.
- 观察到的结构过渡温度的变化和诱导的铁电排序突出了通过替换调整材料性能的潜力.
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