论文标题
使用磁场成像技术基于钻石晶体中的氮 - 胶合中心的磁场成像技术调查Cr $ _2 $ o $ $ $ _3 $薄膜结构的温度依赖性的调查
Investigation of temperature dependence of magnetic properties of Cr$_2$O$_3$ thin film structure using a magnetic field imaging technique based on Nitrogen-Vacancy centres in diamond crystal
论文作者
论文摘要
这项工作提出了一种基于用于薄膜结构的钻石晶体中的颜色中心的磁场成像方法。为了证明我们的设备的能力，我们将其用于表征cr $ _2 $ o $ o $ _3 $薄膜结构上和低于Néel温度的微观尺度的磁性特性。获得的测量结果清楚地确定了Cr $ _2 $ o $ o $ _3 $薄膜的磁相变的检测，其意外的diamagnetic类似于19 $^{\ circ} $ c（低于cr $ _2 $ o $ $ o $ _3 $的Néel温度以下）。为了在由薄膜产生的磁场中获得更好的见解，我们向薄膜表面附近的磁场进行了模拟。我们还分析了光学检测到的磁共振（ODMR）曲线，以确保测得的特性仅与光学检测到的磁共振的移位有关。我们演示了基于氮的磁力测定法可以为研究薄膜的相变动力学和空间磁场分布提供方便的平台，从而可以与其他广泛使用的测量技术相媲美。
This work presents a magnetic field imaging method based on color centres in diamond crystal applied to thin film structure. To demonstrate the capacity of our device we have used it for characterization of magnetic properties in microscopic scale of Cr$_2$O$_3$ thin film structure above and below Néel temperature. The obtained measurement results clearly identify the detection of the magnetic phase transition of Cr$_2$O$_3$ thin film with an unexpected diamagnetic like behaviour at 19$^{\circ}$C (below the Néel temperature of Cr$_2$O$_3$). To have better insights in the magnetic fields created by the thin films we present simulations of the magnetic fields near the thin film surface. We also analysed the optically detected magnetic resonance (ODMR) profiles to be sure that the measured property is related only to the shift of the optically detected magnetic resonance. We demonstrate how Nitrogen-Vacancy centre based magnetometry can deliver a convenient platform for research of phase transition dynamics and spatial magnetic field distributions of thin films, that can rival other widely used measurement techniques.
