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
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 N...
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Main Authors | , , , , , |
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Format | Journal Article |
Language | English |
Published |
10.08.2020
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Subjects | |
Online Access | Get full text |
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Summary: | 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 N\'eel
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 N\'eel 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. |
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DOI: | 10.48550/arxiv.2008.04371 |