561 citations · 840 across the 17 of their papers we have counts for
7 papers · 1 filter
Determination of the Anisotropy of Permittivity of Quantum Paraelectric Strontium Titanate
Maxim Goryachev, Lingfei Zhao, Zijun Zhao +3
The dielectric properties of strontium titanate (SrTiO) have previously been reported from room temperature to low temperatures with conflicting results. In this work, precisio…
Collective Behaviour of Cr ions in Ruby Revealed by Whispering Gallery Modes
Jeremy Bourhill, Maxim Goryachev, Warrick G. Farr +1
We present evidence for collective action of Cr ion impurities in a highly doped ruby crystal at microwave frequencies. The cylindrical geometry of the crystal allows for th…
Evidence of Dilute Ferromagnetism in Rare-Earth doped YAG
W. G. Farr, M. Goryachev, J. M. le Floch +2
This work demonstrates strong coupling regime between an Erbium ion spin ensemble and microwave Hybrid Cavity-Whispering Gallery Modes in a Yttrium Aluminium Garnet dielectric crys…
Strong Coupling between Whispering Gallery Modes and Chromium Ions in Ruby
Warrick G. Farr, Maxim Goryachev, Daniel L. Creedon +1
We report the study of interactions between cavity photons and paramagnetic Cr spins in a ruby (Cr:AlO) Whispering Gallery mode (WGM) resonator. Examining the…
Giant -factors of Natural Impurities in Synthetic Quartz
Maxim Goryachev, Warrick G. Farr, Michael E. Tobar
We report the observation of -factors of natural paramagnetic impurities in a pure synthetic quartz crystal at milli-Kelvin temperatures. Measurements are made by performing spe…
Ultrasensitive microwave spectroscopy of paramagnetic impurities of sapphire crystals at millikelvin temperatures
Warrick G. Farr, Daniel L. Creedon, Maxim Goryachev +2
Progress in the emerging field of engineered quantum systems requires the development of devices that can act as quantum memories. The realisation of such devices by doping solid s…
Hybrid Electron Spin Resonance and Whispering Gallery Mode Resonance Spectroscopy of Fe3+ in Sapphire
Karim Benmessai, Warrick G. Farr, Daniel L. Creedon +4
The development of a new era of quantum devices requires an understanding of how paramagnetic dopants or impurity spins behave in crystal hosts. Here, we describe a new spectroscop…