Spheres
The device is equipped is based on a novel electrodynamic model extracting ΔH of the material under test from the frequency and Q-factor of the magnetic-plasmon-resonance (MPR) of the sphere measured for a given vertical position of the magnet knob.
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5–9 GHz (standard; extended 2–18 GHz*) |
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Up to ~60 GHz** |
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Hand-held tunable magnet |
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D < 0.6 mm |
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< 0.25 Oe @ 2 GHz < 5 Oe @ 5 GHz < 30 Oe @ 18 GHz |
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Room |
* Extended 2–18 GHz operation via spacer sleeves and cavity support changes.
** Cavity acts as a mechanical holder up to ~60 GHz; operation beyond 18 GHz requires stronger magnetic bias (e.g., external magnet). |
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Exemplary measurement results. MPR resonance curve (inset)
is necessary to extract DH.
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