3C多态的Ba0.6Sr0.4MnO3的表轴稳定和持久核化
Catherine Zhou1, Charles Evans1, Elizabeth C Dickey1
1Department of Materials Science and Engineering, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States.
ACS applied materials & interfaces
|January 17, 2024
概括
研究人员稳定了一种罕见的氧化 (BaSrMnO3) 薄膜的立方相. 间隔脉冲激光沉积 (iPLD) 允许创建平面,单相薄膜,推进磁铁电材料.
科学领域:
- 材料科学 材料科学 材料科学
- 固态物理 固态物理
- 薄膜沉积的情况
背景情况:
- 富含BA的Sr1-MnO (BSMO) 化合物是具有显著磁电合的磁铁电.
- BSMO的立方 (3C) 阶段通常仅限于x ≤ 0.5的组合,较高的Ba含量形成六角多态.
- 稳定富含Ba的3C相对于探索先进的磁电应用至关重要.
研究的目的:
- 为了扩展立方 (3C) Ba0.6Sr0.4MnO3 (BSMO) 薄膜组合的相位边界.
- 研究改善3CBSMO膜的平度和相位纯度的方法.
- 探索间隔脉冲激光沉积 (iPLD) 对稳定转移稳定相的潜力.
主要方法:
- 在DyScO (101) 基板上的Ba0.6Sr0.4MnO3薄膜上使用常规脉冲激光沉积 (rPLD) 与特定气体混合物 (0.1% O2/99.9% N2) 进行表轴稳定.
- 将rPLD与间隔脉冲激光沉积 (iPLD) 进行比较,其中沉积周期性地被中断以进行回火.
- 薄膜形态,相纯度和厚度的表征.
主要成果:
- 对于BSMO薄膜的3C相极限成功地推到了Ba0.6Sr0.4MnO3.
- rPLD产生了混合的3C/4H相和粗薄膜,厚度为24nm及以上.
- iPLD显著改善了薄膜平度,并增加了所需3C多态的体积分数,产生了40nm单相薄膜.
结论:
- 间隔脉冲激光沉积 (iPLD) 在改善3CBSMO多态等转移稳定相的持续核化方面非常有效.
- iPLD提供了一种新的方法,用于新材料和复杂的氧化物相的表轴稳定.
- 这项工作可以进一步研究3C结构中的丰富的BSMO化合物,用于先进的磁电应用.
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