Hosain M A, Le Floch J-M, Krupka J, Tobar M E
ARC Centre of Excellence for Engineered Quantum Systems, School of Physics, University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia.
ARC Centre of Excellence for Engineered Quantum Systems, School of Physics, University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia; MOE Key Laboratory of Fundamental Physical Quantities Measurement, School of Physics, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China.
J Magn Reson. 2017 Aug;281:209-216. doi: 10.1016/j.jmr.2017.06.007. Epub 2017 Jun 11.
A cylindrical single crystal SrLaAlO Whispering Gallery mode dielectric resonator was cooled to millikelvin temperature using a dilution refrigerator. By controlling a DC-magnetic field, impurity ions' spins were coupled to a variety of modes allowing the measurement of hybrid spin-photon systems. This Electron Spin Resonance mapping technique allowed us to detect Cu,Fe and Mn impurity ions (at the level of parts per million (ppm) to parts per billion (ppb)), verified by the measurement of the spin parameters along with their site symmetry. Whispering Gallery modes exhibited Q-factors ⩾10 at a temperature less than 20mK, allowing sensitive spectroscopy with high precision. Measured hyperfine line constants of the Cu ion shows different parallel g-factors, g, of 2.526,2.375,2.246 and 2.142. The spin-orbit coupling constant of the Cu ion was determined to be λ≃-635cm. The low-spin state Fe ion's measured parallel g-factor, g, of 2.028 reveals tetragonal anisotropy. The Mn ion is identified in the lattice, producing hyperfine structure with high-valued g-factors,g, of 7.789,7.745,7.688,7.613,7.5304 and 7.446. The hyperfine structures of the Cu and Mn ions show broadening of about 79G between 9.072GHz and 10.631GHz, and 24.5G broadening between 9.072GHz and 14.871GHz, respectively.
一个圆柱形的单晶SrLaAlO回音壁模式介质谐振器使用稀释制冷机被冷却到毫开尔文温度。通过控制直流磁场，杂质离子的自旋与多种模式耦合，从而能够测量混合自旋 - 光子系统。这种电子自旋共振映射技术使我们能够检测到铜、铁和锰杂质离子（浓度水平在百万分之一（ppm）到十亿分之一（ppb）），通过测量自旋参数及其晶位对称性得到了验证。回音壁模式在温度低于20mK时表现出品质因数Q⩾10，从而能够进行高精度的灵敏光谱学研究。测量得到的铜离子超精细线常数显示出不同的平行g因子，分别为2.526、2.375、2.246和2.142。确定铜离子的自旋 - 轨道耦合常数为λ≃ - 635cm。测量得到的低自旋态铁离子的平行g因子为2.028，显示出四方各向异性。在晶格中识别出了锰离子，其产生的超精细结构具有高值的g因子，分别为7.789、7.745、7.688、7.613、7.5304和7.446。铜离子和锰离子的超精细结构在9.072GHz至10.631GHz之间分别展宽约79G，在9.072GHz至14.871GHz之间展宽24.5G。
