Strain-dependent structure and Raman behaviours in the heavy-ion irradiated manganite at extreme low dose.,Scientific Reports

当前位置： X-MOL 学术 › Sci. Rep. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Strain-dependent structure and Raman behaviours in the heavy-ion irradiated manganite at extreme low dose.
Scientific Reports ( IF 3.8 ) Pub Date : 2019-12-16 , DOI: 10.1038/s41598-019-55638-1
Nam Nhat Hoang ₁ , Duc Huyen Yen Pham _{1,

2} , The Nghia Nguyen ₃

Affiliation

The microstrains in heavy-ion irradiated manganite LaMnO3 can be managed in linear response of irradiation dose, and the corresponding internal pressure up to 8 GPa can be induced by varying doses. The response of structure under stress is studied by means of Density Functional Theory and Lattice Dynamic Calculation. All obtained Raman scattering lines are discussed in details to shed light onto structural changes during ion implantation. There appears new resonance peak at around 550 cm-1, which splits from broad features in the spectra, and attributes to the anti-symmetric vibrations of O6 cages. The blue shift of this peak scales to ~2.4 cm-1 per 1 GPa of stress. Another strong feature showing considerable blue shift is seen in the vicinity of 640 cm-1 and corresponds to one of rhombohedral distortion related soft modes. A weak mode, not frequently reported, is seen at around 420 cm-1 and corresponds to translation-like motions of fixed O6 cages.

中文翻译：

重离子辐照锰矿在极低剂量下的应变依赖性结构和拉曼行为。

重离子辐照锰矿LaMnO3中的微应变可以通过辐照剂量的线性响应进行管理，并且通过改变剂量可以诱发高达8 GPa的相应内部压力。利用密度泛函理论和晶格动态计算方法研究了结构在应力作用下的响应。详细讨论了所有获得的拉曼散射线，以阐明离子注入过程中的结构变化。在550 cm-1附近出现一个新的共振峰，该峰与光谱中的宽泛特征分开，并归因于O6笼的反对称振动。每1 GPa应力，该峰的蓝移缩放为〜2.4 cm-1。在640 cm-1附近可以看到另一个显示出明显蓝移的强大特征，它对应于菱形扭曲相关的柔和模式之一。弱模式

更新日期：2019-12-17

点击分享查看原文

点击收藏

公开下载

阅读更多本刊新发论文本刊介绍/投稿指南