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Related Concept Videos

Atomic Force Microscopy01:08

Atomic Force Microscopy

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Atomic force microscopy (AFM) is a type of scanning probe microscopy that can analyze topographic details of various specimens like ceramics, glass, polymers, and biological samples. AFM offers over 1000 times more resolution than the optical imaging system. Images generated from AFM are three-dimensional surface profiles, offering an advantage over the flat, two-dimensional images from other imaging techniques.
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Atomic Nuclei: Magnetic Resonance01:05

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The number of nuclear spins aligned in the lower energy state is slightly greater than those in the higher energy state. In the presence of an external magnetic field, as the spins precess at the Larmor frequency, the excess population results in a net magnetization oriented along the z axis. When a pulse or a short burst of radio waves at the Larmor frequency is applied along the x axis, the coupling of frequencies causes resonance and flips the nuclear spins of the excess population from the...
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In the absence of an external magnetic field, nuclear spin states are degenerate and randomly oriented. When a magnetic field is applied, the spins begin to precess and orient themselves along (lower energy) or against (higher energy) the direction of the field. At equilibrium, a slight excess population of spins exists in the lower energy state. Because the direction of the magnetic field is fixed as the z-axis,  the precessing magnetic moments are randomly oriented around the z-axis.
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Optimizing Magnetic Force Microscopy Resolution and Sensitivity to Visualize Nanoscale Magnetic Domains
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Promoting Atoms into Delocalized Long-Living Magnetically Modified State Using Atomic Force Microscopy.

Y Kinoshita1, R Turanský2, J Brndiar2

  • 1Department of Applied Physics, Osaka University , 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan.

Nano Letters
|November 4, 2016
PubMed
Summary

We precisely controlled cobalt (Co) atoms on a copper surface using atomic force microscopy. This technique requires mechanical control of the atom

Keywords:
AFM manipulationFriedel oscillationsmagnetic atomsmechanical control of spin

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Area of Science:

  • Surface science
  • Atomic manipulation
  • Quantum mechanics

Background:

  • Atomic force microscopy (AFM) is crucial for nanoscale imaging and manipulation.
  • Controlling individual atoms on surfaces is key for developing quantum technologies.
  • Understanding atom-surface interactions is fundamental in condensed matter physics.

Purpose of the Study:

  • To demonstrate low-temperature atomic force microscopy manipulation of cobalt (Co) atoms.
  • To investigate the use of long-range forces, including Friedel oscillations, in atomic manipulation.
  • To explore the necessity of mechanical control over the atom's spin state during manipulation.

Main Methods:

  • Utilized low-temperature atomic force microscopy in ultrahigh vacuum.
  • Employed both short-range chemical forces and long-range forces (Friedel oscillations) for manipulation.
  • Prearranged cobalt nanostructures on an oxidized copper surface to generate specific charge densities.

Main Results:

  • Achieved delocalization of a manipulated Co atom over several surface unit cells for extended periods.
  • Demonstrated that long-range forces, influenced by prearranged Co nanostructures, contribute to atomic manipulation.
  • Showcased that the manipulation protocol necessitates mechanical control of the Co atom's spin state.

Conclusions:

  • Low-temperature AFM enables precise, long-duration delocalization of individual atoms.
  • Friedel oscillations, driven by surface nanostructures, offer a viable mechanism for long-range atomic manipulation.
  • Mechanical control of atomic spin states is essential for advanced atomic manipulation protocols.