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Related Concept Videos

Mass Analyzers: Common Types01:19

Mass Analyzers: Common Types

The quadrupole mass analyzer consists of four cylindrical metal rods arranged in a diamond carrying a DC voltage and a radio-frequency AC voltage. The motion of ions through the quadrupole depends on the field strength, causing only ions of a certain m/z to resonate successfully and strike the detector at a given field strength. Though the transmission rate for these analyzers is high, the exact elemental composition of the sample is not determined because of low resolution; however, they are...

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Capturing Coherent Magnons by Tip-Assisted Terahertz Spectroscopy.

Byung Cheol Park1,2, Sang Hyup Oh3, Young Jai Choi3

  • 1Sungkyunkwan University, Suwon 16419, Republic of Korea.

Nano Letters
|February 13, 2024
PubMed
Summary

Tip-assisted terahertz spectroscopy reveals two coherent magnon types in YFeO3. This versatile technique accurately probes spin waves, enabling real-space investigations of magnetic materials.

Keywords:
canted antiferromagnet YFeO3coherent magnon emissionquasi-ferromagnetic (antiferromagnetic) magnontip-assisted terahertz spectroscopy

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Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Spectroscopy

Background:

  • Spin waves are fundamental excitations in magnetic materials, crucial for understanding their dynamic properties.
  • Coherent magnons, the quanta of spin waves, are key to advanced magnetic phenomena and technologies.
  • Investigating spin waves often requires advanced spectroscopic techniques.

Purpose of the Study:

  • To demonstrate the versatility and credibility of tip-assisted terahertz spectroscopy for probing coherent magnons.
  • To identify and characterize different types of coherent magnons in magnetic materials.
  • To explore the potential of this technique for localized, real-space investigations of spin dynamics.

Main Methods:

  • Utilized tip-assisted terahertz spectroscopy to probe spin wave excitations.
  • Analyzed coherent magnons in canted antiferromagnet YFeO3.
  • Compared results with far-field terahertz spectroscopy for validation.

Main Results:

  • Identified two distinct types of coherent magnons in YFeO3.
  • Demonstrated excellent agreement between tip-assisted and far-field terahertz spectroscopy for magnon parameters (coherence time, resonance frequency).
  • Observed enhanced detection of coherent ferromagnetic magnons near the sample surface.

Conclusions:

  • Tip-assisted terahertz spectroscopy is a credible and versatile technique for studying coherent magnons.
  • The method provides valuable insights into spin wave behavior, including spatial localization.
  • This technique opens new avenues for real-space, localized investigations of spin waves in magnetic solids.