Magnetic resonance force microscopy using ferromagnetic resonance of a magnetic tip excited by microwave transmission via a coaxial resonator
Magnetic resonance force microscopy using ferromagnetic resonance of a magnetic tip excited by microwave transmission via a coaxial resonator
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使用由同轴谐振器微波传输激发的磁尖的铁磁共振进行磁共振力显微镜
DOI：
10.1088/1361-6528/aa90f4
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发表时间：
2017
期刊：
影响因子：
3.5
通讯作者：
H. Saito and Y. Sugawara
中科院分区：
文献类型：
--
作者：
Y. Kinoshita;Y. J. Li;S. Yoshimura;H. Saito and Y. Sugawara
目前的工作提出了磁共振力显微镜（MRFM）的基础上的铁磁共振（FMR）调制的磁性尖端使用微波传输通过同轴谐振器，而不是使用传统的微波辐射的外部天线。在该MRFM中，同轴谐振器电连接到磁性悬臂梁尖端，这使得在常规磁力显微镜中能够简单地实现磁性尖端的FMR激励。可以容易地从连接到磁性尖端的传输线的反射谱中提取尖端的FMR频率。尖端FMR的激发从尖端振荡的机械响应的微波频率依赖性被确认。这种磁共振频率调制方法可以有效地提取样品表面附近的磁相互作用力，而不影响样品的磁状态。成功地展示了退磁薄膜永磁体上磁畴结构的纳米尺度成像。
The present work proposes magnetic resonance force microscopy (MRFM) based on ferromagnetic resonance (FMR) modulation of a magnetic tip using microwave transmission via a coaxial resonator instead of using conventional microwave irradiation by an external antenna. In this MRFM, the coaxial resonator is electrically connected to the magnetic cantilever tip, which enables simple implementation of FMR excitation of a magnetic tip in conventional magnetic force microscopy. The FMR frequency of the tip can be easily extracted from the reflection spectrum of a transmission line connected to the magnetic tip. The excitation of tip FMR is confirmed from the microwave frequency dependence of the mechanical response of the tip oscillation. This MRFM is effective for extracting the magnetic interaction force near a sample surface without perturbation of its magnetic state. Nanometer-scale imaging of magnetic domain structures on a demagnetized thin-film permanent magnet is successfully demonstrated.