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Measuring broadband magnetic fields on the nanoscale using a hybrid quantum register
Ingmar Jakobi1, Philipp Neumann1, Ya Wang1
13. Physikalisches Institut, Universität Stuttgart and Institute for Integrated Quantum Science and Technology IQST, Pfaffenwaldring 57, 70569 Stuttgart, Germany.
Nature Nanotechnology
|November 8, 2016
Summary
Researchers precisely measured nanoscale magnetic fields from hard-disk-drive write heads using single spin manipulation. This breakthrough enables characterization of fields crucial for advancing miniaturized electronic devices.
Area of Science:
- Nanoscale science and technology
- Materials science
- Quantum physics
Background:
- Generating and controlling nanoscale magnetic fields with large gradients is vital for materials science and device applications.
- Characterizing these fields at high bandwidth and arbitrary orientations has been a significant challenge.
Purpose of the Study:
- To develop a method for high-resolution, high-bandwidth characterization of nanoscale magnetic fields.
- To measure magnetic field profiles and gradients generated by hard-disk-drive write heads.
Main Methods:
- Utilized coherent control of single electron and nuclear spins.
- Derived magnetic field profiles from spin Rabi oscillations near the gigahertz range.
- Quantified axial and radial components of static and dynamic magnetic fields.
Main Results:
- Achieved high spatial resolution and large bandwidth magnetic field measurements.
- Measured magnetic field gradients on the order of 1 2005 mT/nm.
- Successfully quantified magnetic field components independent of orientation.
Conclusions:
- The developed method allows for precision measurement of nanoscale write head magnetic fields.
- This technique is crucial for the future miniaturization of magnetic storage devices.
