OPTICAL NUTATION AND FREE INDUCTION DECAY IN MAGNETOACTIVE INDIUM ANTIMONIDE

1999 ◽  
Vol 08 (03) ◽  
pp. 431-441
Author(s):  
J. THOMAS ANDREWS ◽  
PRATIMA SEN
Keyword(s):  
Magnetic Field ◽  
Indium Antimonide ◽  
Free Induction Decay ◽  
Field Amplitude ◽  
Lead Salt ◽  
Thin Sample ◽  
Crystal Laser ◽  
Amplitude Increase ◽  
Free Induction ◽  
Numerical Estimations

Using the density matrix approach, the effect of magnetic field on optical nutation and free induction decay (FID) has been investigated analytically in direct gap semiconductors. The numerical estimations made for a thin sample of bulk InSb duly irradiated by a Lead salt (PbEuSeTe) diode laser exhibit an enhancement in the beat signal intensity of the nutating output at large magnetic fields. The numerical analysis of free induction decay in InSb crystal–laser interacting system yield the results that both the decay time as well as transmitted field amplitude increase with increasing magnetic field.

Optical free-induction decay of paramagnetic molecules in magnetic field

Laser Physics ◽  
2019 ◽  
Vol 30 (1) ◽  
pp. 015204 ◽  
Author(s):  
Evgeniy N Chesnokov ◽  
Lev N Krasnoperov ◽  
Vitaly V Kubarev
Keyword(s):  
Magnetic Field ◽  
Free Induction Decay ◽  
Free Induction ◽  
Paramagnetic Molecules

scholarly journals A new limit of the 129Xenon Electric Dipole Moment

2019 ◽  
Vol 219 ◽  
pp. 02003
Author(s):  
Fabian Allmendinger ◽  
Ilhan Engin ◽  
Olivier Grasdijk ◽  
Werner Heil ◽  
Klaus Jungmann ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Dipole Moment ◽  
Electric Dipole Moment ◽  
Electric Dipole ◽  
Free Induction Decay ◽  
Low Noise ◽  
Upper Limit ◽  
Free Induction ◽  
Field Fluctuations ◽  
Spin Species

We report on the first preliminary result of our 129Xe EDM measurement performed by the MIXed collaboration. The aim of this report is to demonstrate the feasibility of a new method to set limits on nuclear EDMs by investigating the EDM of the diamagnetic 129Xe atoms. In our setup, hyperpolarized 3He serves as a comagnetometer needed to suppress magnetic field fluctuations. The free induction decay of the two polarized spin species is directly measured by low noise DC SQUIDs, and the weighted phase difference extracted from these measurements is used to determine a preliminary upper limit on the 129Xe EDM.

Magnetic-field quantum beats in two-photon free-induction decay

1978 ◽  
Vol 3 (5) ◽  
pp. 172 ◽  
Author(s):  
N. P. Economou ◽  
P. F. Liao
Keyword(s):  
Magnetic Field ◽  
Free Induction Decay ◽  
Quantum Beats ◽  
Two Photon ◽  
Free Induction

Quantifying background magnetic-field inhomogeneity for improved interpretation of free induction decay measurements

Geophysics ◽  
2014 ◽  
Vol 79 (1) ◽  
pp. E11-E21 ◽  
Author(s):  
Denys Grombacher ◽  
Jan O. Walbrecker ◽  
Rosemary Knight
Keyword(s):  
Magnetic Field ◽  
Free Induction Decay ◽  
Pulse Sequences ◽  
Relaxation Times ◽  
Statistical Distribution ◽  
Pore Scale ◽  
Background Magnetic Field ◽  
Free Induction ◽  
Scale Properties ◽  
The Impact

Nuclear magnetic resonance measurements provide useful insight into pore-scale properties of porous media. One influence affecting the measurement is inhomogeneity in the static background magnetic field ([Formula: see text]). This inhomogeneity can significantly alter the relaxation signal and potentially obscure pore-scale information. To improve the understanding of this effect on the free-induction decay (FID), a measurement still commonly used in practice, a novel methodology is developed to estimate the statistical distribution of [Formula: see text]. A suite of preparatory pulse sequences is developed to encode information about the [Formula: see text] field in the initial amplitude and phase of the FID following each sequence and an inversion is employed to predict the statistical distribution of [Formula: see text]. Knowledge of the [Formula: see text] distribution is then used to correct for the impact of [Formula: see text] inhomogeneity on the FID measurement; this is essential for improving the usefulness of FID measurements for the estimation of pore-scale properties. Results are presented for both numerical and laboratory studies verifying the feasibility of the developed methodology in a controlled laboratory environment, and demonstrating that knowledge of the statistical distribution of [Formula: see text] is sufficient to estimate the impact of [Formula: see text] inhomogeneity on the FID in cases where [Formula: see text] inhomogeneity causes less than an order of magnitude decrease in the relaxation times governing the FID.

The influence of magnetic field on the echo-like free induction decay in NO2

2016 ◽  
Vol 662 ◽  
pp. 62-66 ◽  
Author(s):  
E.N. Chesnokov ◽  
V.V. Kubarev ◽  
P.V. Koshlyakov ◽  
A.I. Chichinin ◽  
Y.V. Getmanov ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Free Induction Decay ◽  
Free Induction

scholarly journals Free Induction Decay and Spin Echo Signals from Spin Triplet States of Axially Asymmetric Objects in Single Crystals in Zero Constant Magnetic Field:

2020 ◽  
Vol 5 (7) ◽  
pp. 813-821
Author(s):  
Nathalie P. Fokina ◽  
Maia O. Elizbarashvili
Keyword(s):  
Magnetic Field ◽  
Single Crystals ◽  
Constant Magnetic Field ◽  
Free Induction Decay ◽  
Spin Echo ◽  
Zero Field ◽  
Triplet States ◽  
Free Induction ◽  
Spin Triplet ◽  
Axially Asymmetric

Anisotropic dynamics of the spin triplet states (STSs) in single crystals with the zero field splitting (ZFS) of their levels by the axially asymmetric Hamiltonian is investigated in zero constant magnetic field (ZF) under the action of the canonically oriented varying magnetic fields. The equations of motion for single transition operators (STOs) corresponding to the definite transition of ZFS are derived.  The obtained equations written in terms of one averaged equation for STO vector appeared to be a particular case (for STS) of the universal equation of Feynman et al, which is valid for any kind of perturbation affecting only two levels of any quantum mechanical system. As well as that, our equation is analogous to the Bloch equation without decay for the usual magnetization components of the Zeeman system in a constant magnetic field and a transverse to it varying field. This statement is valid, if the population probabilities of the corresponding levels of STS are not artificially equalized. At that, the motion of the observable macroscopic sample magnetization, which follows from our equations, has quite different character. Here, in terms of this magnetization the signals of the free induction decay and of the two-pulse spin echo are calculated in ZF.  

Magnetic field effect on the free induction decay of hydroxyl radicals (OH) in the terahertz region

2020 ◽  
Vol 22 (36) ◽  
pp. 20248-20252
Author(s):  
E. N. Chesnokov ◽  
V. V. Kubarev ◽  
L. N. Krasnoperov ◽  
P. V. Koshlyakov
Keyword(s):  
Magnetic Field ◽  
Free Radical ◽  
Hydroxyl Radicals ◽  
Field Effect ◽  
Free Induction Decay ◽  
Longitudinal Magnetic Field ◽  
Magnetic Field Effect ◽  
Terahertz Region ◽  
Free Induction ◽  
First Time

The effect of an external longitudinal magnetic field on the optical free induction decay from a free radical is observed for the first time.

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