Materials Map

Discover the materials research landscape. Find experts, partners, networks.

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The Materials Map is an open tool for improving networking and interdisciplinary exchange within materials research. It enables cross-database search for cooperation and network partners and discovering of the research landscape.

The dashboard provides detailed information about the selected scientist, e.g. publications. The dashboard can be filtered and shows the relationship to co-authors in different diagrams. In addition, a link is provided to find contact information.

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Materials Map under construction

The Materials Map is still under development. In its current state, it is only based on one single data source and, thus, incomplete and contains duplicates. We are working on incorporating new open data sources like ORCID to improve the quality and the timeliness of our data. We will update Materials Map as soon as possible and kindly ask for your patience.

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in Cooperation with on an Cooperation-Score of 37%

Topics

Publications (6/6 displayed)

  • 2024Conductivity freeze-out in isotopically pure Si -28 at millikelvin temperatures1citations
  • 2019Experimental implementations of cavity-magnon systems78citations
  • 2019Low-Temperature Properties of Whispering-Gallery Modes in Isotopically Pure Silicon-284citations
  • 2018Isotopically Pure Silcon-28 Whispering Gallery Mode Resonatorscitations
  • 2018Cavity magnon polaritons with lithium ferrite and three-dimensional microwave resonators at millikelvin temperatures33citations
  • 2016Ultrahigh cooperativity interactions between magnons and resonant photons in a YIG sphere216citations

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Chart of shared publication
Mcallister, Ben T.
1 / 2 shared
Tobar, Michael
6 / 14 shared
Creedon, Daniel
3 / 4 shared
Johnson, Brett C.
2 / 5 shared
Flower, Graeme
1 / 1 shared
Jamieson, D. N.
1 / 1 shared
Johnson, B. C.
1 / 5 shared
Creedon, D. L.
1 / 2 shared
Jamieson, David
1 / 2 shared
Kostylev, Mikhail
1 / 15 shared
Watt, S.
1 / 1 shared
Kostylev, N.
1 / 2 shared
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2024
2019
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2016

Co-Authors (by relevance)

  • Mcallister, Ben T.
  • Tobar, Michael
  • Creedon, Daniel
  • Johnson, Brett C.
  • Flower, Graeme
  • Jamieson, D. N.
  • Johnson, B. C.
  • Creedon, D. L.
  • Jamieson, David
  • Kostylev, Mikhail
  • Watt, S.
  • Kostylev, N.
OrganizationsLocationPeople

article

Ultrahigh cooperativity interactions between magnons and resonant photons in a YIG sphere

  • Tobar, Michael
  • Kostylev, N.
  • Creedon, Daniel
  • Bourhill, Jeremy
Abstract

© 2016 American Physical Society. Resonant photon modes of a 5-mm-diameter yttrium iron garnet (YIG) sphere loaded in a cylindrical cavity in the 10-30-GHz frequency range are characterized as a function of applied dc magnetic field at millikelvin temperatures. The photon modes are confined mainly to the sphere and exhibited large mode filling factors in comparison to previous experiments, allowing ultrastrong coupling with the magnon spin-wave resonances. The largest observed coupling between photons and magnons is 2g/2p=7.11 GHz for a 15.5-GHz mode, corresponding to a cooperativity of C=1.51±0.47×107. Complex modifications, beyond a simple multioscillator model, of the photon mode frequencies were observed between 0 and 0.1 T. Between 0.4 and 1 T, degenerate resonant photon modes were observed to interact with magnon spin-wave resonances with different coupling strengths, indicating time-reversal symmetry breaking due to the gyrotropic permeability of YIG. Bare dielectric resonator mode frequencies were determined by detuning magnon modes to significantly higher frequencies with strong magnetic fields. By comparing measured mode frequencies at 7 T with finite element modeling, a bare dielectric permittivity of 15.96±0.02 of the YIG crystal has been determined at about 20 mK.

Topics
  • impedance spectroscopy
  • experiment
  • strength
  • permeability
  • iron
  • Yttrium