Partial excitation in electron spin-echo envelope modulation spectroscopy

Barkhuijsen, H.; Beer, R. de; Pronk, B.J.; Ormondt, D. van

doi:10.1016/0022-2364(85)90083-6

Cited by 6 publications

(5 citation statements)

References 10 publications

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“…One may wonder if the rapid superhyperfine decay can be canceled thus exploiting the reversibility of the process. There is no obvious solution except extending the pulse duration or reducing the power to perform a spectral selection [38][39][40]. This is an interesting approach to gain understanding on the system but this constrains the apparent decay to the experimental parameters (pulse duration for example).…”

Section: Discussionmentioning

confidence: 99%

Superhyperfine induced photon-echo collapse of erbium in Y2SiO5

2020

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We investigate the decoherence of Er 3+ in Y 2 SiO 5 at low magnetic fields using the photon-echo technique. We reproduce accurately a variety of the decay curves with a unique coherence time by considering the so-called superhyperfine modulation induced by a large number of neighboring spins. There is no need to invoke any characteristic time of the spin fluctuations to reproduce very different decay curves. The number of involved nuclei increases when the magnetic is lowered. The experiment is compared with a model associating 100 surrounding ions with their exact positions in the crystal frame. We also derive an approximate spherical model (angular averaging) to interpret the main feature the observed decay curves close to zero field.

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Section: Discussionmentioning

confidence: 99%

Superhyperfine induced photon-echo collapse of erbium in Y2SiO5

2020

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“…One may wonder if the rapid superhyperfine decay can be cancelled thus exploiting the reversibility of the process. There is no obvious solution except extending the pulse duration or reducing the power to perform a spectral selection [30][31][32] . This is an interesting approach to gain understanding on the system but this constrains the apparent decay to the experimental parameters (pulse duration for example).…”

Section: Discussionmentioning

confidence: 99%

Superhyperfine induced photon-echo collapse of erbium in Y$_2$SiO$_5$

Car,

Gouët,

Chanelière

2020

Preprint

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We investigate the decoherence of Er 3+ in Y2SiO5 at low magnetic fields using the photon-echo technique. We reproduce accurately a variety of the decay curves with a unique coherence time by considering the so-called superhyperfine modulation induced by a large number of neighbouring spins. There is no need to invoke any characteristic time of the spin fluctuations to reproduce very different decay curves. The number of involved nuclei increases when the magnetic is lowered. The experiment is compared with a model associating 100 surrounding ions with their exact positions in the crystal frame. We also derive an approximate spherical model (angular averaging) to interpret the main feature the observed decay curves close to zero-field.

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“…In each case, the absolute value form of the cosine transform was used to generate the frequency spectrum. excitation of the hyperfine manifold (Barkhuijsen et al, 1985), due to an insufficient IE field in the microwave pulse, is one factor that can limit the depth of modulations. The 2-fold higher H, field from the ESE spectrometer at the Massachusetts Institute of Technology did not enhance the depths of modulations due to nitrogen nuclear spins over those observed from the same samples with the lower power spectrometer.…”

Section: Methodsmentioning

confidence: 99%

Observation of manganese(II)-ligand superhyperfine couplings in complexes with proteins by electron spin-echo spectroscopy

LoBrutto¹,

Smithers²,

Reed³

et al. 1986

Biochemistry

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Pulsed electron paramagnetic resonance spectroscopy has been used to detect Mn(II)-ligand superhyperfine couplings in complexes with creatine kinase and in the Mn(II) metalloprotein concanavalin A. Electron spin-echo envelopes from Mn(II), bound in these complexes, are modulated by superhyperfine interactions between Mn(II) and nearby, weakly coupled nuclear spins. The characteristic frequencies of the modulations were obtained by Fourier transformation of the three-pulse, spin-echo envelopes. In transition-state analogue complexes of creatine kinase (enzyme-MnIIADP-anion-creatine), superhyperfine interactions from the directly coordinated nitrogen of the thiocyanate ligand give envelope modulations. The source of the modulations was confirmed by measurements with the 14N and 15N forms of thiocyanate. On the other hand, the nitrogen of coordinated nitrate, which is two bonds removed from the paramagnetic center, does not produce detectable modulations. In spectra for Mn(II) concanavalin A, envelope modulations are detected due to the nitrogen of the coordinated histidine residue. Complexes prepared in 2H2O give strong signals due to weakly coupled 2H. For Mn(II)-doped single crystals of sodium pyrophosphate, signals are observed in the frequency domain spectra that are due to coupling from 31P. Phosphorus signals from the ADP ligand in complexes with creatine kinase show approximately the same coupling constant but have a much broader line width.

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Partial excitation in electron spin-echo envelope modulation spectroscopy

Cited by 6 publications

References 10 publications

Superhyperfine induced photon-echo collapse of erbium in Y2SiO5

Superhyperfine induced photon-echo collapse of erbium in Y2SiO5

Superhyperfine induced photon-echo collapse of erbium in Y$_2$SiO$_5$

Observation of manganese(II)-ligand superhyperfine couplings in complexes with proteins by electron spin-echo spectroscopy

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