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Title: A diamond-based scanning probe spin sensor operating at low temperature in ultra-high vacuum

We present the design and performance of an ultra-high vacuum (UHV) low temperature scanning probe microscope employing the nitrogen-vacancy color center in diamond as an ultrasensitive magnetic field sensor. Using this center as an atomic-size scanning probe has enabled imaging of nanoscale magnetic fields and single spins under ambient conditions. In this article we describe an experimental setup to operate this sensor in a cryogenic UHV environment. This will extend the applicability to a variety of molecular systems due to the enhanced target spin lifetimes at low temperature and the controlled sample preparation under UHV conditions. The instrument combines a tuning-fork based atomic force microscope (AFM) with a high numeric aperture confocal microscope and the facilities for application of radio-frequency (RF) fields for spin manipulation. We verify a sample temperature of <50 K even for strong laser and RF excitation and demonstrate magnetic resonance imaging with a magnetic AFM tip.
Authors:
;  [1] ;  [2] ;  [3] ;  [1] ;  [1] ;  [4]
  1. Max-Planck Institute for Solid State Research, 70569 Stuttgart (Germany)
  2. (Germany)
  3. 3rd Institute of Physics and Research Center SCoPE, University Stuttgart, 70569 Stuttgart (Germany)
  4. (Switzerland)
Publication Date:
OSTI Identifier:
22251196
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 85; Journal Issue: 1; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; APERTURES; ATOMIC FORCE MICROSCOPY; COLOR CENTERS; DESIGN; DIAMONDS; EXCITATION; LASERS; LIFETIME; MAGNETIC FIELDS; MICROSCOPES; NANOSTRUCTURES; NITROGEN; NMR IMAGING; PROBES; RADIOWAVE RADIATION; SAMPLE PREPARATION; SENSORS; SPIN