Synergistic Dielectric–Magnetic Enhancement via Phase-Evolution Engineering and Dynamic Magnetic Resonance,Advanced Functional Materials

当前位置： X-MOL 学术 › Adv. Funct. Mater. › 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.)

Synergistic Dielectric–Magnetic Enhancement via Phase-Evolution Engineering and Dynamic Magnetic Resonance
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2023-01-29 , DOI: 10.1002/adfm.202211298
Panbo Liu ₁ , Guozheng Zhang ₁ , Hanxiao Xu ₁ , Shuaici Cheng ₁ , Ying Huang ₁ , Bo Ouyang ₂ , Yuetong Qian ₃ , Ruixuan Zhang ₃ , Renchao Che _{3,

4}

Affiliation

Dielectric polarization and magnetic resonance associated with intrinsic constituent and extrinsic structure are two kinds of fundamental attenuation mechanisms for microwave absorbers, but remain extremely challenging in revealing the composition-morphology-performance correlation. Herein, hierarchical MXene/metal-organic framework derivatives with coherent boundaries and magnetic units below critical grain size are constructed to realize synergistic dielectric–magnetic enhancement by phase-evolution engineering and dynamic magnetic resonance. Specifically, phase-evolution induced inseparable interfaces, diverse incompatible phases, and defects/vacancies contribute to dielectric polarization, while closely distributed magnetic units simultaneously realize nanoscale multi-domain coupling and long-range magnetic interaction. As results, the hierarchical derivatives promise an exceptional reflection loss of −59.5 dB and an effective absorption bandwidth of 6.1 GHz. Both experimental results and theoretical calculations indicate that phase-evolution engineering and dynamic magnetic resonance maximize the absorption capability and demonstrate a versatile methodology for manipulating microwave attenuation. More importantly, the proposed multi-domain coupling and long-range magnetic interaction theories innovatively offer dynamic magnetic resonance mechanism for magnetic loss within critical grain size.

中文翻译：

通过相演化工程和动态磁共振协同介电-磁增强

与本征成分和外在结构相关的介电极化和磁共振是微波吸收剂的两种基本衰减机制，但在揭示成分-形态-性能相关性方面仍然极具挑战性。在此，构建了具有相干边界和低于临界晶粒尺寸的磁性单元的分层 MXene/金属有机框架衍生物，以通过相演化工程和动态磁共振实现协同介电-磁性增强。具体来说，相演化导致不可分离的界面、不同的不相容相和缺陷/空位有助于介电极化，而紧密分布的磁性单元同时实现纳米级多畴耦合和长程磁相互作用。结果，分级导数承诺具有 −59.5 dB 的异常反射损耗和 6.1 GHz 的有效吸收带宽。实验结果和理论计算均表明，相演化工程和动态磁共振最大限度地提高了吸收能力，并展示了一种控制微波衰减的通用方法。更重要的是，所提出的多域耦合和长程磁相互作用理论创新性地为临界晶粒尺寸内的磁损耗提供了动态磁共振机制。实验结果和理论计算均表明，相演化工程和动态磁共振最大限度地提高了吸收能力，并展示了一种控制微波衰减的通用方法。更重要的是，所提出的多域耦合和长程磁相互作用理论创新性地为临界晶粒尺寸内的磁损耗提供了动态磁共振机制。实验结果和理论计算均表明，相演化工程和动态磁共振最大限度地提高了吸收能力，并展示了一种控制微波衰减的通用方法。更重要的是，所提出的多域耦合和长程磁相互作用理论创新性地为临界晶粒尺寸内的磁损耗提供了动态磁共振机制。

更新日期：2023-01-29

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南