使用螺旋式腔位测量仪检测电磁相位转换
Pavel N Lapa1, George Kassabian1, Ali C Basaran1
1Department of Physics and Center for Advanced Nanoscience, University of California San Diego, La Jolla, California 92093, USA.
The Review of scientific instruments
|October 20, 2023
概括
我们开发了一种灵敏,紧的susceptometer,用于检测材料相位过渡. 该设备使用了一种新的螺旋腔共振器,用于在广泛的温度和磁场范围内进行精确的测量.
科学领域:
- 材料科学 材料科学 材料科学
- 凝聚物质物理学 凝聚物质物理学
- 物理化学 物理化学
背景情况:
- 阶段过渡检测对于材料合成和表征至关重要.
- 传统的微波吸收技术是敏感的,但需要庞大的,昂贵的设备不适合冷静态.
- 需要紧,灵敏的仪器进行现场相位过渡分析.
研究的目的:
- 设计和制造一个高度灵敏的susceptometer用于检测相位过渡.
- 为了克服传统微波吸收技术在尺寸和冷静机集成方面的局限性.
- 为了证明设备在检测各种材料中的各种电磁转换方面的能力.
主要方法:
- 制造了一种定制的悬疑计,将一个小型螺旋腔共振器集成到商业冷静装置插件中.
- 响应器以低于千兆赫的频率工作,使其对材料特性变化具有高度灵敏度.
- 该系统通过检测超导,金属绝缘体,铁磁和超磁过渡来进行测试.
主要成果:
- 研发的susceptometer表现出高灵敏度,检测到微量物质的过渡 (到10^-9cc).
- 在广泛的温度范围 (2400 K) 和磁场范围 (高达90 kOe) 上进行了测量.
- 成功检测了各种相变,包括Nb和YBa2Cu3O7-δ中的超导性,V2O3中的金属绝缘体,Gd中的铁磁性和NiCoMnIn中的超磁性过渡.
结论:
- 这种新型螺旋腔感应仪为材料表征提供了一种灵敏和多功能工具.
- 这种紧的装置克服了传统方法的局限性,使得在冷静装置内进行现场研究成为可能.
- 证明的能力为各种物理现象的先进材料合成和分析铺平了道路.
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