Cryogenic electron spin resonance microimaging probe

Twig, Ygal; Dikarov, Ekaterina; Blank, Aharon

doi:10.1016/j.jmr.2012.03.005

Cited by 18 publications

(21 citation statements)

References 41 publications

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“…(b) Measured 2D ESR signal distribution employing ESR micro-imaging technique, using the imaging pulse sequence described in Ref. 24 and the same CPMG sequence parameters as in Fig. 2.…”

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confidence: 99%

Induction-detection electron spin resonance with spin sensitivity of a few tens of spins

Artzi

Twig

Blank

2015

Applied Physics Letters

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Articles you may be interested inInfluence of the electron spin resonance saturation on the power sensitivity of cryogenic sapphire resonators Note: High sensitivity pulsed electron spin resonance spectroscopy with induction detection Rev. Sci. Instrum. 82, 076105 (2011); 10.1063/1.3611003Advantages of superconducting quantum interference device-detected magnetic resonance over conventional high-frequency electron paramagnetic resonance for characterization of nanomagnetic materials

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“…(b) Measured 2D ESR signal distribution employing ESR micro-imaging technique, using the imaging pulse sequence described in Ref. 24 and the same CPMG sequence parameters as in Fig. 2.…”

mentioning

confidence: 99%

Induction-detection electron spin resonance with spin sensitivity of a few tens of spins

Artzi

Twig

Blank

2015

Applied Physics Letters

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“…To complete the list of requirements that would enable such ∼0.1‐nm resolution image of the dark spins near the NV, based on the Fourier imaging approach, the need for pulsed field gradients that spatially encode the positions of the dark spins must also be taken into consideration. Here, we can relate to our well‐proven pulsed field gradient capabilities developed for conventional induction–detection ESR microimaging . The resolution (full width at half‐maximum of the signal) in this case is determined by the strength and duration of the pulsed field gradient and is given by

Δ x = \frac{1}{(γ_{normale} / 2 π) \int_{t} G_{\max} normald normalt},

where γ e is the electron gyromagnetic ratio and G max is the amplitude of the maximally applied gradient used for imaging.…”

Section: Dark Spins Imaging and Spectroscopy With Odmrmentioning

confidence: 99%

Spectroscopy, imaging, and selective addressing of dark spins at the nanoscale with optically detected magnetic resonance

Blank

2016

Physica Status Solidi (b)

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Unpaired electron spins are an indispensable part of many condensed-matter systems. Detecting and imaging them, acquiring their spectrum, and selectively addressing these spins at the nanoscale level are ongoing challenges that have been answered only partially to date for a very limited type of physical systems. One recent effort to overcome these challenges makes use of fluorescence detection of paramagnetic defects in diamond crystals to indirectly obtain information about nearby unpaired electron spins that are not fluorescent (known as "dark spins"). Here, we provide a quantitative analysis of the factors affecting the sensitivity of such setup for dark-spin detection. This is followed by the presentation of a new approach for the detection of the full complex coherent magnetization of the dark spins via its effect on the fluorescence of optically detected nearby diamond defects. This approach can be used for the efficient acquisition of advanced spectroscopic data of a small number of spins as well as for their efficient imaging and selective addressing, based on magnetic resonance imaging (MRI)-like protocols. Our new spectroscopy and imaging approach is theoretically analyzed to obtain estimations about its possible capabilities in terms of sensitivity and imaging/addressing resolution for a sample with specific dark-spin characteristics.

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“…S1. The measurement setup is based on our conventional pulsed ESR microimaging system (26) together with our cryogenic pulsed ESR probehead (27). In order to facilitate the generation and acquisition of the pulse sequence described in Fig.…”

Section: The Pulsed Edmr Microimaging Setupmentioning

confidence: 99%

High resolution in-operando microimaging of solar cells with pulsed electrically-detected magnetic resonance

Katz

Fehr

Schnegg

et al. 2015

Journal of Magnetic Resonance

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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 using the electron spin resonance (ESR) technique. In many instances, ESR is not sensitive enough to deal with miniature devices having small numbers of paramagnetic species and high spatial heterogeneity. This limitation can in principle be overcome by employing a more sensitive method called electrically-detected magnetic resonance, which is based on measuring the effect of paramagnetic species on the electric current of the device while inducing electron spin-flip transitions. However, up until now, measurement of the current of the device could not reveal the spatial heterogeneity of its paramagnetic species. We provide here, for the first time, high resolution microimages of paramagnetic species in operating solar cells obtained through electrically-detected magnetic resonance. The method is based on unique microwave pulse sequences for excitation and detection of the electrical signal under a static magnetic field and powerful pulsed magnetic field gradients that spatially encode the electrical current of the sample. The approach developed here can be widely used in the nondestructive threedimensional inspection and characterization of paramagnetic species in a variety of electronic devices. Key Words: ESR; EPR; Electrically-Detected Magnetic Resonance; Semiconductor Defects 3 Significance statementThe detection and imaging of point defects, dopants, and impurities in solid-state devices is significant because of their effect on device performance. Conventionally, these species are observed using electron spin resonance, which suffers from limited sensitivity and spatial resolution. Recently, an alternative and much more sensitive detection method has emerged, based on measuring the effect of these so-called paramagnetic species on the device's electric current. However, this electrical detection method could not be used to obtain high resolution images of paramagnetic species in heterogeneous samples. We present here a recent methodological development that provides, for the first time, highresolution microimages of the paramagnetic species in an operating device (solar cell) obtained through a combination of pulsed electrical detection and MRI-like imaging protocols.4

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Cryogenic electron spin resonance microimaging probe

Cited by 18 publications

References 41 publications

Induction-detection electron spin resonance with spin sensitivity of a few tens of spins

Induction-detection electron spin resonance with spin sensitivity of a few tens of spins

Spectroscopy, imaging, and selective addressing of dark spins at the nanoscale with optically detected magnetic resonance

High resolution in-operando microimaging of solar cells with pulsed electrically-detected magnetic resonance

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