极磁体CaBaCo4O7的动态磁电效应

IF 3.6 2区物理与天体物理 Q2 PHYSICS, APPLIED

Applied Physics Letters Pub Date : 2025-04-09 DOI:10.1063/5.0265593

Yingjie He, Deshun Hong, Na Su, Yi-Sheng Chai, Yu Sui, Young Sun

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引用次数: 0

摘要

本文研究了极磁体CaBaCo4O7的动态磁电系数αE与温度和磁场的关系。αE的温度依赖性在零磁场下的磁转变温度TC处达到峰值，表明在相边界附近磁电效应增强。当直流磁场沿a轴或b轴施加时，αE的峰值位置不断向较高温度移动，峰值振幅在临界磁场处达到最大值，在较高磁场处衰减。得到的磁电相图表明，最大的动态磁电效应发生在TC以上的区域，其中短程磁相关起着至关重要的作用，峰值是由超磁跃迁引起的。磁致伸缩系数λ/dH的测量结果表明，磁电效应与磁弹性耦合密切相关。我们的研究为实现极磁体在高温下显著的动态磁电效应提供了见解。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Dynamic magnetoelectric effect of the polar magnet CaBaCo4O7

We have investigated the temperature and magnetic field dependence of the dynamic magnetoelectric coefficient αE of the polar magnet CaBaCo4O7. The temperature dependence of αE exhibits a peak at the magnetic transition temperature TC in zero magnetic field, evidencing an enhanced magnetoelectric effect near the phase boundary. When a DC magnetic field is applied along either a- or b-axis, the peak position of αE shifts continuously to a higher temperature while the peak amplitude reaches the maximum at a critical field and decays for higher magnetic fields. The obtained magnetoelectric phase diagram suggests that the maximum dynamic magnetoelectric effect occurs in a region above TC where short-range magnetic correlations play a crucial role and the peak is due to a metamagnetic transition. The measurements of the magnetostrictive coefficient dλ/dH reveal that the magnetoelectric effect is closely related to the magnetoelastic coupling. Our study provides insights toward achieving significant dynamic magnetoelectric effect at high temperatures in polar magnets.

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来源期刊

Applied Physics Letters 物理-物理：应用

CiteScore

6.40

自引率

10.00%

发文量

1821

审稿时长

1.6 months

期刊介绍： Applied Physics Letters (APL) features concise, up-to-date reports on significant new findings in applied physics. Emphasizing rapid dissemination of key data and new physical insights, APL offers prompt publication of new experimental and theoretical papers reporting applications of physics phenomena to all branches of science, engineering, and modern technology. In addition to regular articles, the journal also publishes invited Fast Track, Perspectives, and in-depth Editorials which report on cutting-edge areas in applied physics. APL Perspectives are forward-looking invited letters which highlight recent developments or discoveries. Emphasis is placed on very recent developments, potentially disruptive technologies, open questions and possible solutions. They also include a mini-roadmap detailing where the community should direct efforts in order for the phenomena to be viable for application and the challenges associated with meeting that performance threshold. Perspectives are characterized by personal viewpoints and opinions of recognized experts in the field. Fast Track articles are invited original research articles that report results that are particularly novel and important or provide a significant advancement in an emerging field. Because of the urgency and scientific importance of the work, the peer review process is accelerated. If, during the review process, it becomes apparent that the paper does not meet the Fast Track criterion, it is returned to a normal track.