Dresden 2017 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 67: Poster 4
MA 67.24: Poster
Freitag, 24. März 2017, 09:30–13:00, P2-OG3
Nanoscale temperature sensing for a new generation of hard disk recording heads — •Sven Bodenstedt1, Ingmar Jakobi1, Fadi El Hallak2, Philipp Neumann1, and Jörg Wrachtrup1 — 13. Physikalisches Institut, Universität Stuttgart — 2Seagate Technology
State of the art hard disk recording heads use magnetic fields to encode data as magnetization on small sectors on a recording medium. A new generation of recording heads, called Heat Assisted Magnetic Recording (HAMR) [1], employs an additional nanoscopic heat spot to reduce the coercivity of a single recording bit on the recording medium. Although HAMR heads are not yet available in commercial drives this technology may increase storage capacities by orders of magnitude.
The development of the device hinges on suitable sensors for the nanoscale characterization of the produced heat. Nitrogen-vacancy (NV) defect centers in diamond are the ideal candidate for this task. In addition to being efficient magnetometers that can be used to survey the magnetic field of recording heads [2] they are also sensitive to temperature changes [3, 4]. Here we present our work to bring a NV nanoscale thermometer to the hard disk industry.
[1] M. Krayder et al., Proceedings of the IEEE, 2008
[2] I. Jakobi et al., Nature Nanotechnology, 2016
[3] P. Neumann et al., Nano Letters, 2013
[4] A. Laraoui et al., Nature Communications, 2015