Multi-frequency rapid-scan HFEPR

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26620%2F18%3APU129901" target="_blank" >RIV/00216305:26620/18:PU129901 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1016/j.jmr.2018.09.005" target="_blank" >http://dx.doi.org/10.1016/j.jmr.2018.09.005</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.jmr.2018.09.005" target="_blank" >10.1016/j.jmr.2018.09.005</a>

Result language
angličtina
Original language name
Multi-frequency rapid-scan HFEPR
Original language description
Gaining access to electron spin dynamics at (sub-)THz frequencies is highly challenging. However, this information is highly relevant for the understanding and development of spin polarization agents in dynamic nuclear polarization methods and single-molecule magnets for quantum computation. Here we demonstrate the first rapid-scan EPR experiment in 200 GHz frequency region. A voltage controlled oscillator (VCO) generated fast sinusoidal frequency sweeps with scan rates up to 3 105 THz/s after the frequency multiplication, which is equal to 107 T/s in field representation. Such high scan rates provide access to extremely short relaxation times T2 ¼ ð2p sweep rateÞ0:5 1 ns. The absence of a microwave cavity allowed us to perform multi-frequency experiments in the 170–250 GHz range. A further advantage of a cavity-less approach is the possibility to use vast sweeps, which in turn, allows the deconvolution using a linear sweep function. The deconvoluted spectra obtained with this method are identical to the slow-rate spectrum. We find spin-spin relaxation times of several nanoseconds for pure LiPc samples in this frequency range. These values cannot be obtained by means of conventional pulsed EPR methods.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10301 - Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)

Project
<a href="/en/project/LQ1601" target="_blank" >LQ1601: CEITEC 2020</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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