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Pregled bibliografske jedinice broj: 1027555

Modulation sidebands spectra within inhomogeneous CW-EPR line detected by double modulation EPR spectroscopy


Rakvin, Boris; Carić, Dejana; Kveder, Marina
Modulation sidebands spectra within inhomogeneous CW-EPR line detected by double modulation EPR spectroscopy // Journal of magnetic resonance (San Diego, Calif.), 307 (2019), 106587-106596 doi:10.1016/j.jmr.2019.106587 (međunarodna recenzija, članak, ostalo)


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Naslov
Modulation sidebands spectra within inhomogeneous CW-EPR line detected by double modulation EPR spectroscopy

Autori
Rakvin, Boris ; Carić, Dejana ; Kveder, Marina

Izvornik
Journal of magnetic resonance (San Diego, Calif.) (1090-7807) 307 (2019); 106587-106596

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, ostalo

Ključne riječi
EPR ; Magnetic field modulation ; Double magnetic field modulation ; Modulation sidebands

Sažetak
Conventional modulation spectrum, MS, in continuous wave electron paramagnetic resonance, CW-EPR, is produced by applying longitudinal radiofrequency (RF) fields with the frequencies, ωrf, which exceeds the linewidth, 2πδ, of a single spectral line given in frequency units. The second longitudinal RF field with frequency, ωrf2, is employed to produce double modulation spectrum, DMS. In this work DMS are presented as a specific type of MS which can be produced from an ordinary homogenous line. The numerical simulations of DMS in the limit of low power saturation relied on the recently introduced multi-photon transitions formalism which includes one microwave photon in combination with an arbitrary number of radiofrequency photons. It is shown that DMS of an inhomogeneous line exhibits similar basic structure as MS and exhibits sideband peaks at multiples of basic radiofrequencies. Linewidths of these peaks are significantly narrower (cca. two – three orders of magnitude) than the inhomogeneous linewidth and can be correlated with the underlying homogeneous linewidth components on the basis of characteristic spin-lattice, T1, and spin- spin, T2, relaxation times. The capability to extract T1 and T2 from DMS was tested on the well-known E’ defect in irradiated vitreous SiO2. The obtained results revealed the impact of “rapid passage” effect on DMS in improving the detection sensitivity of DMS in the study of paramagnetic centers with long relaxation times. Therefore, double modulation method can be considered as a complementary method for studying inhomegeneous broadening in the EPR spectra.

Izvorni jezik
Engleski

Znanstvena područja
Fizika, Kemija



POVEZANOST RADA


Projekti:
HRZZ-IP-2018-01-3168 - Studija važnosti spinskih međudjelovanja kao osnova za nove pristupe u istraživanju materijala (SPES) (Ilakovac-Kveder, Marina, HRZZ - 2018-01) ( POIROT)

Ustanove:
Institut "Ruđer Bošković", Zagreb

Profili:

Avatar Url Boris Rakvin (autor)

Avatar Url Dejana Carić (autor)

Avatar Url Marina Ilakovac-Kveder (autor)

Poveznice na cjeloviti tekst rada:

doi www.sciencedirect.com doi.org

Citiraj ovu publikaciju:

Rakvin, Boris; Carić, Dejana; Kveder, Marina
Modulation sidebands spectra within inhomogeneous CW-EPR line detected by double modulation EPR spectroscopy // Journal of magnetic resonance (San Diego, Calif.), 307 (2019), 106587-106596 doi:10.1016/j.jmr.2019.106587 (međunarodna recenzija, članak, ostalo)
Rakvin, B., Carić, D. & Kveder, M. (2019) Modulation sidebands spectra within inhomogeneous CW-EPR line detected by double modulation EPR spectroscopy. Journal of magnetic resonance (San Diego, Calif.), 307, 106587-106596 doi:10.1016/j.jmr.2019.106587.
@article{article, year = {2019}, pages = {106587-106596}, DOI = {10.1016/j.jmr.2019.106587}, keywords = {EPR, Magnetic field modulation, Double magnetic field modulation, Modulation sidebands}, journal = {Journal of magnetic resonance (San Diego, Calif.)}, doi = {10.1016/j.jmr.2019.106587}, volume = {307}, issn = {1090-7807}, title = {Modulation sidebands spectra within inhomogeneous CW-EPR line detected by double modulation EPR spectroscopy}, keyword = {EPR, Magnetic field modulation, Double magnetic field modulation, Modulation sidebands} }
@article{article, year = {2019}, pages = {106587-106596}, DOI = {10.1016/j.jmr.2019.106587}, keywords = {EPR, Magnetic field modulation, Double magnetic field modulation, Modulation sidebands}, journal = {Journal of magnetic resonance (San Diego, Calif.)}, doi = {10.1016/j.jmr.2019.106587}, volume = {307}, issn = {1090-7807}, title = {Modulation sidebands spectra within inhomogeneous CW-EPR line detected by double modulation EPR spectroscopy}, keyword = {EPR, Magnetic field modulation, Double magnetic field modulation, Modulation sidebands} }

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus
  • MEDLINE


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