量子金刚石显微镜测定微磁体交流磁化率的方法

IF 5.6 2区 物理与天体物理 Q1 OPTICS
Shishir Dasika, Matthew L. Markham, Kasturi Saha
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引用次数: 0

摘要

交流电纳计不同于静态电纳计,它可以更深入地了解磁性材料。通过采用交流磁化率测量,可以收集到有关磁动力学的关键细节。然而,传统的交流电纳计只能测量每特斯拉几纳焦耳范围内的磁矩变化。此外,它们的空间分辨率受到严重限制,限制了它们的应用仅限于散装样品。在这项研究中,我们介绍了利用基于氮空位(NV)中心的量子金刚石显微镜来绘制交流驱动场下微米尺度铁磁样品产生的磁场,这可以用于确定样品的交流磁化率,并提供足够的附加信息。通过采用相干脉冲序列,我们从70微米视场范围内的样品中提取样品磁场的同相分量,同时获得1微米的分辨率。此外,我们量化了在频率达到几百千赫兹的激励下偶极矩的变化,其量级为飞焦耳/特斯拉。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Quantum diamond microscope method to determine AC susceptibility in micro-magnets

AC susceptometry, unlike static susceptometry, offers a deeper insight into magnetic materials. By employing AC susceptibility measurements, one can glean into crucial details regarding magnetic dynamics. Nevertheless, traditional AC susceptometers are constrained to measuring changes in magnetic moments within the range of a few nano-joules per tesla. Additionally, their spatial resolution is severely limited, confining their application to bulk samples only. In this study, we introduce the utilization of a Nitrogen Vacancy (NV) center-based quantum diamond microscope for mapping the magnetic fields resulting from micron-scale ferromagnetic samples under an AC drive field, which can be used for determining AC susceptibility with sufficient additional information about the sample. By employing coherent pulse sequences, we extract the in-phase component of the sample magnetic field from samples within a field of view spanning 70 micro-meters while achieving a resolution of 1 micro-meter. Furthermore, we quantify changes in dipole moment on the order of a femto-joules per tesla induced by excitations at frequencies reaching several hundred kilohertz.

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来源期刊
EPJ Quantum Technology
EPJ Quantum Technology Physics and Astronomy-Atomic and Molecular Physics, and Optics
CiteScore
7.70
自引率
7.50%
发文量
28
审稿时长
71 days
期刊介绍: Driven by advances in technology and experimental capability, the last decade has seen the emergence of quantum technology: a new praxis for controlling the quantum world. It is now possible to engineer complex, multi-component systems that merge the once distinct fields of quantum optics and condensed matter physics. EPJ Quantum Technology covers theoretical and experimental advances in subjects including but not limited to the following: Quantum measurement, metrology and lithography Quantum complex systems, networks and cellular automata Quantum electromechanical systems Quantum optomechanical systems Quantum machines, engineering and nanorobotics Quantum control theory Quantum information, communication and computation Quantum thermodynamics Quantum metamaterials The effect of Casimir forces on micro- and nano-electromechanical systems Quantum biology Quantum sensing Hybrid quantum systems Quantum simulations.
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