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Detection of electron paramagnetic resonance (EPR) using a microwave cavity resonating at a fixed frequency (between 9 and 10 GHz) remains the most popular method until now. Here, we report a cavity-less technique which makes use of only an…

Applied Physics · Physics 2020-02-06 Ushnish Chaudhuri , R. Mahendiran

Electron paramagnetic resonance (EPR) spectroscopy interrogates unpaired electron spins in solids and liquids to reveal local structure and dynamics; for example, EPR has elucidated parts of the structure of protein complexes that have…

Other Condensed Matter · Physics 2012-05-08 S. Takahashi , L. -C. Brunel , D. T. Edwards , J. van Tol , G. Ramian , S. Han , M. S. Sherwin

Presented are magnetization measurements on a crystal of Fe8 single-molecule magnets using a Hall probe magnetometer. Irradiation with microwaves at frequencies of 92 and 110-120 GHz leads to the observation of electron paramagnetic…

Mesoscale and Nanoscale Physics · Physics 2007-05-23 K. Petukhov , W. Wernsdorfer , A. -L. Barra

Electron paramagnetic resonance (EPR) can provide unique insight into the chemical structure and magnetic properties of dopants in oxide and semiconducting materials that are of interest for applications in electronics, catalysis, and…

We demonstrate electron spin polarization detection and electron paramagnetic resonance (EPR) spectroscopy using a direct current superconducting quantum interference device (dc-SQUID) magnetometer. Our target electron spin ensemble is…

Mesoscale and Nanoscale Physics · Physics 2024-06-24 Hiraku Toida , Yuichiro Matsuzaki , Kosuke Kakuyanagi , Xiaobo Zhu , William J. Munro , Kae Nemoto , Hiroshi Yamaguchi , Shiro Saito

Paramagnetic magnetic resonance, a powerful technique for characterizing and identifying chemical targets, is increasingly used for imaging; however, low spin polarization at room temperature and moderate magnetic fields poses challenges…

Mesoscale and Nanoscale Physics · Physics 2019-09-04 C. M. Purser , V. P. Bhallamudi , C. S. Wolfe , H. Yusuf , B. A. McCullian , C. Jayaprakash , M. E. Flatté , P. C. Hammel

We describe instrumentation for a high-frequency electron paramagnetic resonance (EPR) and pulsed electron-electron double resonance (PELDOR) spectroscopy. The instrumentation is operated in the frequency range of 107$-$120 GHz and…

Instrumentation and Detectors · Physics 2015-06-19 Franklin H. Cho , Viktor Stepanov , Susumu Takahashi

Electron paramagnetic resonance (EPR) is a valuable tool for physics, chemistry, biology and medicine, providing complementary spectroscopic information to NMR. It has long been known that EPR at high magnetic fields offers greater spectral…

The investigation of paramagnetic species (such as point defects, dopants, and impurities) in solid-state electronic devices is significant because of their effect on device performance. Conventionally, these species are detected and imaged…

Materials Science · Physics 2015-05-20 Itai Katz , Matthias Fehr , Alexander Schnegg , Klaus Lips , Aharon Blank

Electron paramagnetic resonance spectroscopy (EPR) is among the most important analytical tools in physics, chemistry, and biology. The emergence of nitrogen-vacancy (NV) centers in diamond, serving as an atomic-sized magnetometer, has…

Quantum Physics · Physics 2020-06-01 Fei Kong , Pengju Zhao , Pei Yu , Zhuoyang Qin , Zhehua Huang , Zhecheng Wang , Mengqi Wang , Fazhan Shi , Jiangfeng Du

Multifrequency pulsed electron paramagnetic resonance (EPR) spectroscopy using S-, X-, Q- and W-Band frequencies (3.6, 9.7, 34, and 94 GHz, respectively) was employed to study paramagnetic coordination defects in undoped hydrogenated…

Materials Science · Physics 2011-09-20 M. Fehr , A. Schnegg , B. Rech , K. Lips , O. Asthakov , F. Finger , G. Pfanner , C. Freysoldt , J. Neugebauer , R. Bittl , C. Teutloff

The impurity-induced antiferromagnetic ordering of the doped Haldane magnet Pb(Ni{1-x}Mg{x})2V2O8 (0 < x <0.06) was studied by electron spin resonance (ESR) on ceramic samples in the frequency range 9-110 GHz. Below the N\'{e}el temperature…

Strongly Correlated Electrons · Physics 2009-11-07 A. I. Smirnov , V. N. Glazkov , H. -A. Krug von Nidda , A. Loidl , L. N. Demianets , A. Ya. Shapiro

SiC based metal-oxide-semiconductor field-effect transistors (MOSFETs) have gained a significant importance in power electronics applications. However, electrically active defects at the SiC/SiO$_2$ interface degrade the ideal behavior of…

We present results of an electron paramagnetic resonance (EPR) study of Nd$_{1-x}$Sr$_x$MnO$_3$ with x = 0.5 across the paramagnetic to ferromagnetic, insulator to metal transition at 260 K (T$_c$) and the antiferromagnetic, charge ordering…

Strongly Correlated Electrons · Physics 2007-05-23 Janhavi P. Joshi , A. K. Sood , S. V. Bhat , A. R. Raju , C. N. R. Rao

Electron paramagnetic resonance (EPR) spectroscopy is an important technology in physics, chemistry, materials science, and biology. Sensitive detection with a small sample volume is a key objective in these areas, because it is crucial,…

In standard electron paramagnetic resonance (EPR) spectroscopy, the frequency of an experiment is set and the spectrum is acquired using magnetic field as the independent variable. There are cases in which it is desirable instead to fix the…

Applied Physics · Physics 2020-02-26 G. Joshi , J. Kubasek , I. Nikolov , B. Sheehan , T. A. costa , R. A. A. Cassaro , J. R. Friedman

Single crystals of the free radical 2,2-diphenyl-1-picrylhydrazyl (DPPH) obtained from diethyl ether (ether) and carbon disulfide (CS2) were characterized by the X-ray diffraction, IR, EPR and SQUID magnetization techniques. The X-ray…

The electron paramagnetic resonance (EPR) linewidths of B acceptors in Si are found to reduce dramatically in isotopically purified 28Si single crystals. Moreover, extremely narrow substructures in the EPR spectra are visible corresponding…

A computational study of the Electron Paramagnetic Resonance (EPR) $g$-tensors and hyperfine tensors of Li and Ga vacancies in LiGaO$_2$ is presented. Density Functinal Theory (DFT) calculations are carried out of the Ga and Li vacancies…

Materials Science · Physics 2020-04-22 Dmitry Skachkov , Walter Lambrecht , Klichchupong Dabsamut , Adisak Boonchun

We report the nanoscale spin detection and electron paramagnetic resonance (EPR) spectrum of copper (Cu$^{2+}$) ions via double electron-electron resonance with single spins in diamond at room temperature and low magnetic fields. We measure…

Quantum Physics · Physics 2022-01-06 Kai Zhang , Shreya Ghosh , Sunil Saxena , M. V. Gurudev Dutt
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