Variable Coupling Scheme for High-Frequency Electron Spin Resonance Resonators Using Asymmetric Meshes
نویسندگان
چکیده
منابع مشابه
Variable Coupling Scheme for High Frequency Electron Spin Resonance Resonators Using Asymmetric Meshes.
The sensitivity of a high frequency electron spin resonance (ESR) spectrometer depends strongly on the structure used to couple the incident millimeter wave to the sample that generates the ESR signal. Subsequent coupling of the ESR signal to the detection arm of the spectrometer is also a crucial consideration for achieving high spectrometer sensitivity. In previous work, we found that a means...
متن کاملA ‘‘shunt’’ Fabry–Perot resonator for high-frequency electron spin resonance utilizing a variable coupling scheme
We report on the performance of a Fabry–Perot resonator for far-infrared electron spin resonance ~FIR-ESR! at 250 GHz designed to accommodate a thin, disk-shaped sample that must rest with its flat surface perpendicular to the incident FIR beam. This geometry minimizes dielectric losses, making it possible to obtain FIR-ESR spectra of aqueous or lossy samples with a macroscopic ordering, at can...
متن کاملAqueous sample holders for high-frequency electron spin resonance
A quasioptical approach is utilized to design a resonator and sample holder for aqueous samples for high-frequency ~250 GHz! electron spin resonance ~ESR! spectroscopy. A disk shaped sample geometry was chosen to match the field contours of the fundamental mode in a Fabry–Perot resonator. A transmission-line analysis is used to determine the optimum sample geometry while taking into account dif...
متن کاملMAGNETISATION AND ELECTRON SPIN RESONANCE STUDIES OF TETRAHEDRAL AMORPHOUS CARBON
The magnetisation and electron spin resonance (ESR) spectrum of two specimens of tetrahedral amorphous carbon (ta-C), deposited from a filtered cathodic arc, were measured over a wide temperature range. The magnetisation was found to consist of superparamagnetic, paramagnetic and diamagnetic contributions. The superparamagnetic contribution resembled that recently found in carbon prepared from ...
متن کاملElectron Spin Resonance at the Level of 10^{4} Spins Using Low Impedance Superconducting Resonators.
We report on electron spin resonance measurements of phosphorus donors localized in a 200 μm^{2} area below the inductive wire of a lumped element superconducting resonator. By combining quantum limited parametric amplification with a low impedance microwave resonator design, we are able to detect around 2×10^{4} spins with a signal-to-noise ratio of 1 in a single shot. The 150 Hz coupling str...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Applied Magnetic Resonance
سال: 2009
ISSN: 0937-9347,1613-7507
DOI: 10.1007/s00723-009-0088-1