Electromagnetic properties of terbium gallium garnet at millikelvin temperatures and low photon energy

Nikita Kostylev; Maxim Goryachev; Pavel Bushev; Michael E. Tobar

doi:10.1063/1.4985260

Electromagnetic properties of terbium gallium garnet at millikelvin temperatures and low photon energy

Nikita Kostylev, Maxim Goryachev, Pavel Bushev, Michael E. Tobar

School of Physics, Mathematics and Computing

Research output: Contribution to journal › Article › peer-review

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Abstract

Electromagnetic properties of single crystal terbium gallium garnet are characterised from room down to millikelvin temperatures using the whispering gallery mode method. Microwave spectroscopy is performed at low powers equivalent to a few photons in energy and conducted as functions of the magnetic field and temperature. A phase transition is detected close to the temperature of 3.5 K. This is observed for multiple whispering gallery modes causing an abrupt negative frequency shift and a change in transmission due to extra losses in the new phase caused by a change in complex magnetic susceptibility.

Original language	English
Article number	052402
Journal	Applied Physics Letters
Volume	111
Issue number	5
DOIs	https://doi.org/10.1063/1.4985260
Publication status	Published - 31 Jul 2017

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10.1063/1.4985260

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abstract = "Electromagnetic properties of single crystal terbium gallium garnet are characterised from room down to millikelvin temperatures using the whispering gallery mode method. Microwave spectroscopy is performed at low powers equivalent to a few photons in energy and conducted as functions of the magnetic field and temperature. A phase transition is detected close to the temperature of 3.5 K. This is observed for multiple whispering gallery modes causing an abrupt negative frequency shift and a change in transmission due to extra losses in the new phase caused by a change in complex magnetic susceptibility.",

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AB - Electromagnetic properties of single crystal terbium gallium garnet are characterised from room down to millikelvin temperatures using the whispering gallery mode method. Microwave spectroscopy is performed at low powers equivalent to a few photons in energy and conducted as functions of the magnetic field and temperature. A phase transition is detected close to the temperature of 3.5 K. This is observed for multiple whispering gallery modes causing an abrupt negative frequency shift and a change in transmission due to extra losses in the new phase caused by a change in complex magnetic susceptibility.

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Electromagnetic properties of terbium gallium garnet at millikelvin temperatures and low photon energy

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ARC Centre of Excellence for Engineered Quantum Systems EQuS

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Electromagnetic properties of terbium gallium garnet at millikelvin temperatures and low photon energy

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