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Related Concept Videos

Ferromagnetism01:31

Ferromagnetism

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Materials like iron, nickel, and cobalt consist of magnetic domains, within which the magnetic dipoles are arranged parallel to each other. The magnetic dipoles are rigidly aligned in the same direction within a domain by quantum mechanical coupling among the atoms. This coupling is so strong that even thermal agitation at room temperature cannot break it. The result is that each domain has a net dipole moment. However, some materials have weaker coupling, and are ferromagnetic at lower...
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Two NMR-active nuclei bonded to a central atom can be involved in geminal or two-bond coupling. Geminal coupling is commonly seen between diastereotopic protons in chiral molecules and unsymmetrical alkenes, among others.
The central atom need not be NMR-active because its electrons are affected by the electron polarization of the spin-active atoms. However, spin information is transmitted less effectively than in one-bond coupling, and 2J values are usually weaker than 1J values. The energy of...
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Strong Photon-Magnon Coupling Using a Lithographically Defined Organic Ferrimagnet.

Qin Xu1, Hil Fung Harry Cheung1, Donley S Cormode2

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Summary

Researchers demonstrated a cavity-magnonic system using vanadium tetracyanoethylene (V[TCNE]x), an organic ferrimagnet. This scalable, low-damping magnetic system integrates with superconducting circuits for advanced quantum devices.

Keywords:
cavity magnonicshybrid quantum systemlithographically defined low damping organic ferrimagnetnon‐uniform magnon modesstrong couplingvanadium tetracyanoethylene

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Area of Science:

  • Quantum physics
  • Materials science
  • Condensed matter physics

Background:

  • Integrating low-damping magnetic systems with superconducting circuits presents scalability challenges.
  • Organic-based magnets offer potential for low-temperature processing and patterning.
  • Cavity-magnonic systems are crucial for hybrid quantum technologies.

Purpose of the Study:

  • To demonstrate a cavity-magnonic system using vanadium tetracyanoethylene (V[TCNE]x).
  • To investigate the integration of ultra-low damping magnetic materials with superconducting circuits.
  • To explore the potential for scalable quantum circuit fabrication using magnonic components.

Main Methods:

  • Fabrication of a superconducting microwave resonator coupled to V[TCNE]x magnon modes.
  • Characterization of the cavity-magnonic system at low temperatures (T≈0.4 K).
  • Utilizing electron beam lithography for patterning the V[TCNE]x material.

Main Results:

  • Successful demonstration of strong coupling regime with cooperativity exceeding 1000.
  • Observation of coupling between the Kittel mode and the resonator mode.
  • Identification of higher-order magnon modes with significantly narrower linewidths.

Conclusions:

  • V[TCNE]x is a promising material for scalable quantum circuit integration due to its low damping and processing compatibility.
  • The demonstrated cavity-magnonic system achieves high cooperativity, suitable for quantum applications.
  • This work enables the design and fabrication of magnonic circuits comparable to electrical wiring for hybrid quantum devices.