Quantum Sensing of Spin Transport Properties of an Antiferromagnetic
Insulator
- URL: http://arxiv.org/abs/2011.03905v1
- Date: Sun, 8 Nov 2020 05:46:46 GMT
- Title: Quantum Sensing of Spin Transport Properties of an Antiferromagnetic
Insulator
- Authors: Hailong Wang, Shu Zhang, Nathan J. McLaughlin, Benedetta Flebus,
Mengqi Huang, Yuxuan Xiao, Eric E. Fullerton, Yaroslav Tserkovnyak, Chunhui
Rita Du
- Abstract summary: Antiferromagnetic insulators (AFIs) are of significant interest due to their potential to develop next-generation spintronic devices.
One major effort in this emerging field is to harness AFIs for long-range spin information communication and storage.
Here, we report a non-invasive method to optically access the intrinsic spin transport properties of an archetypical AFI alpha-Fe2O3 via nitrogen-vacancy (NV) quantum spin sensors.
- Score: 1.9694457584158742
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: Antiferromagnetic insulators (AFIs) are of significant interest due to their
potential to develop next-generation spintronic devices. One major effort in
this emerging field is to harness AFIs for long-range spin information
communication and storage. Here, we report a non-invasive method to optically
access the intrinsic spin transport properties of an archetypical AFI
{\alpha}-Fe2O3 via nitrogen-vacancy (NV) quantum spin sensors. By NV
relaxometry measurements, we successfully detect the time-dependent
fluctuations of the longitudinal spin density of {\alpha}-Fe2O3. The observed
frequency dependence of the NV relaxation rate is in agreement with a
theoretical model, from which an intrinsic spin diffusion constant of
{\alpha}-Fe2O3 is experimentally measured in the absence of external spin
biases. Our results highlight the significant opportunity offered by NV centers
in diagnosing the underlying spin transport properties in a broad range of
high-frequency magnetic materials, which are challenging to access by more
conventional measurement techniques.
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