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Integrated magnetic sensors that allow simultaneous EPR and magnetization measurements have been developed to study single molecule magnets. A high frequency microstrip resonator has been integrated with a micro-Hall effect magnetometer.…

Materials Science · Physics 2009-11-11 G. de Loubens , G. D. Chaves , A. D. Kent , C. Ramsey , E. del Barco , C. Beedle , D. N. Hendrickson

The local magnetic field in a Penning-Malmberg trap is found by measuring the temperatures that result when electron plasmas are illuminated by microwaves pulses. Multiple heating resonances are observed as the pulse frequencies are swept.…

Plasma Physics · Physics 2020-03-18 E. D. Hunter , A. Christensen , J. Fajans , T. Friesen , E. Kur , J. S. Wurtele

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 spin resonance (ESR) spectroscopy is the method of choice for characterizing paramagnetic impurities, with applications ranging from chemistry to quantum computing, but it gives access only to ensemble-averaged quantities due to…

Combining electron paramagnetic resonance (EPR) with scanning tunneling microscopy (STM) enables detailed insight into the interactions and magnetic properties of single atoms on surfaces. A requirement for EPR-STM is the efficient coupling…

Mesoscale and Nanoscale Physics · Physics 2020-01-15 T. S. Seifert , S. Kovarik , C. Nistor , L. Persichetti , S. Stepanow , P. Gambardella

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,…

We describe a pulsed multi-frequency electron paramagnetic resonance spectrometer operating at several frequencies in the range of 110-336 GHz. The microwave source at all frequencies consists of a multiplier chain starting from a solid…

Quantum Physics · Physics 2008-12-01 Gavin W. Morley , Louis-Claude Brunel , Johan van Tol

We study theoretically Electron Paramagentic Resonance (EPR) linewidths for single crystals of the molecular magnets Fe$_8$ and Mn$_{12}$ as functions of energy eigenstates $M_s$, frequency, and temperature when a magnetic field along the…

Condensed Matter · Physics 2009-11-07 Kyungwha Park , M. A. Novotny , N. S. Dalal , S. Hill , P. A. Rikvold

We present magnetization measurements on the single molecule magnet Fe8 in the presence of pulsed microwave radiation. A pump-probe technique is used with two microwave pulses with frequencies of 107 GHz and 118 GHz and pulse lengths of…

Mesoscale and Nanoscale Physics · Physics 2007-10-17 S. Bahr , K. Petukhov , V. Mosser , W. Wernsdorfer

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

Electron paramagnetic resonance (EPR) performed with a scanning tunneling microscope (STM) allows for probing the spin excitation of single atomic species with MHz energy resolution. One of the basic applications of conventional EPR is the…

Mesoscale and Nanoscale Physics · Physics 2021-11-10 Tom S. Seifert , Stepan Kovarik , Pietro Gambardella , Sebastian Stepanow

We present measurements on the single molecule magnet Fe8 in the presence of pulsed microwave radiation at 118 GHz. The spin dynamics is studied via time resolved magnetization experiments using a Hall probe magnetometer. We investigate the…

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

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

We describe an experiment aimed at measuring the spin dynamics of the Fe8 single-molecule magnet in the presence of pulsed microwave radiation. In earlier work, heating was observed after a 0.2-ms pulse of intense radiation, indicating that…

Mesoscale and Nanoscale Physics · Physics 2009-11-11 M. Bal , Jonathan R. Friedman , M. T. Tuominen , E. M. Rumberger , D. N. Hendrickson

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…

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 consider various methods and techniques for measuring electron magnetization and susceptibility, which are used in experimental condensed matter physics. The list of considered methods for macroscopic measurements includes…

Materials Science · Physics 2023-02-20 V. M. Pudalov

The design and performance of an electron spin resonance spectrometer operating at 3 and 9 GHz microwave frequencies combined with a 9 T superconducting magnet is described. The probehead contains a compact two-loop, one gap resonator and…

Other Condensed Matter · Physics 2009-11-10 Ferenc Simon , Ferenc Muranyi

Counting the microwave photons emitted by an ensemble of electron spins when they relax radiatively has recently been proposed as a sensitive method for electron paramagnetic resonance (EPR) spectroscopy, enabled by the development of…

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