磁电和反向磁电效应在DyCrO4中,由电子自旋共振探测
Muhammad Waqas Nafees1,2, Xiao Wang3, Liqin Yan1,2
1Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, People's Republic of China.
Journal of physics. Condensed matter : an Institute of Physics journal
|September 9, 2025
概括
这项研究揭示了DyCrO4中使用电子自旋共振 (ESR) 的磁电 (ME) 和逆磁电 (CME) 效应. 在ESR光谱中的异常表明z型DyCrO4中的ME合和s型DyCrO4中的CME合.
科学领域:
- 凝聚物质物理学 凝聚物质物理学
- 材料科学 材料科学 材料科学
- 固态化学 固态化学
背景情况:
- 磁电 (ME) 和反磁电 (CME) 效应是多铁材料中至关重要的现象,可以通过电场控制磁性,反之亦然.
- 色酸盐 (DyCrO4) 是一种具有复杂磁性排序的多铁基材料,是ME和CME研究的候选材料.
研究的目的:
- 研究z型DyCrO4中的磁电 (ME) 效应和s型DyCrO4中的反向磁电 (CME) 效应.
- 利用电子自旋共振 (ESR) 光谱作为一种探测和理解这些材料中的合机制的工具.
主要方法:
- 电子自旋共振 (ESR) 光谱学被用来分析DyCrO4样本,无论是z型 (粉末) 还是s型 (颗粒) 形式.
- 关键的ESR参数,包括峰值到峰值线宽 (ΔHpp),g值和双整数强度 (I),被提取并分析为温度和应用电场 (E) 的函数.
主要成果:
- 在135K的z型DyCrO4中确定了ME合效应,ESR强度和g值的温度依赖性异常表明了这一点.
- 在24K以下的s型DyCrO4中观察到ESR信号强度与应用电场的显著变化,证实了CME合效应.
- 在各种低温下对强度与电场曲线的分析显示了与CME效应一致的温度依赖磁化变化.
结论:
- 电子自旋共振 (ESR) 已被证明是研究ME和CME在DyCrO4.4等多铁基材料中的影响的有效技术.
- 该研究为DyCrO4的磁电特性提供了宝贵的见解,突出了其在多铁器件中的应用潜力.
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