The electron depolarization during dynamic nuclear polarization: measurements and simulations

2015 ◽  
Vol 17 (1) ◽  
pp. 226-244 ◽  
Author(s):  
Y. Hovav ◽  
I. Kaminker ◽  
D. Shimon ◽  
A. Feintuch ◽  
D. Goldfarb ◽  
...  
Keyword(s):  
Spin Polarization ◽  
Electron Spin ◽  
Dynamic Nuclear Polarization ◽  
Nuclear Polarization ◽  
Electron Spin Polarization ◽  
Epr Spectrum ◽  
Polarization Measurements

Measurements and simulations of the electron spin polarization along the EPR spectrum of TEMPOL and trityl radicals, under DNP conditions.

scholarly journals Dynamic nuclear polarization from current-induced electron spin polarization

2014 ◽  
Vol 90 (8) ◽  
Author(s):  
C. J. Trowbridge ◽  
B. M. Norman ◽  
Y. K. Kato ◽  
D. D. Awschalom ◽  
V. Sih
Keyword(s):  
Spin Polarization ◽  
Electron Spin ◽  
Dynamic Nuclear Polarization ◽  
Nuclear Polarization ◽  
Electron Spin Polarization

scholarly journals Viscosity effects on optically generated electron and nuclear spin hyperpolarization

2020 ◽  
Vol 22 (48) ◽  
pp. 28173-28182
Author(s):  
Matthew W. Dale ◽  
Daniel J. Cheney ◽  
Claudio Vallotto ◽  
Christopher J. Wedge
Keyword(s):  
Spin Polarization ◽  
Electron Spin ◽  
Dynamic Nuclear Polarization ◽  
Nuclear Spin ◽  
Nuclear Polarization ◽  
Electron Spin Polarization ◽  
Viscosity Effects

Optically-generated dynamic nuclear polarization is increased in viscous mixtures due to longer lived electron spin polarization.

Photofragment spin-polarization measurements via magnetization quantum beats: dynamics of DI photodissociation

2019 ◽  
Vol 21 (26) ◽  
pp. 14000-14004 ◽  
Author(s):  
Dimitris Sofikitis ◽  
Chrysovalantis S. Kannis ◽  
Gregoris K. Boulogiannis ◽  
Georgios E. Katsoprinakis ◽  
T. Peter Rakitzis
Keyword(s):  
Spin Polarization ◽  
Electron Spin ◽  
Electron Spin Polarization ◽  
Quantum Beats ◽  
Polarization Measurements

We report the electron-spin polarization of D atoms from the photodissociation of DI, at 213 nm and 266 nm, by measuring the magnetization quantum beats of the D atoms with a pick-up coil.

Effects on the magnetic and optical properties of Co-doped ZnO at different electronic states

2017 ◽  
Vol 31 (31) ◽  
pp. 1750247
Author(s):  
Qingyu Huo ◽  
Zhenchao Xu ◽  
Linfeng Qu
Keyword(s):  
Absorption Spectrum ◽  
Spin Polarization ◽  
Electron Spin ◽  
Magnetic Moments ◽  
The State ◽  
Band Gaps ◽  
Electron Spin Polarization ◽  
Approximation Formula ◽  
Doped Zno ◽  
Co Doped

Both blue and red shifts in the absorption spectrum of Co-doped ZnO have been reported at a similar concentration range of doped Co. Moreover, the sources of magnetism of Co-doped ZnO are controversial. To solve these problems, the geometry optimization and energy of different Co-doped ZnO systems were calculated at the states of electron spin polarization and nonspin polarization by adopting plane-wave ultra-soft pseudopotential technology based on density function theory. At the state of electron nonspin polarization, the total energies increased as the concentration of Co-doped increased. The doped systems also became unstable. The formation energies increased and doping became difficult. Furthermore, the band gaps widened and the absorption spectrum exhibited a blue shift. The band gaps were corrected by local-density approximation + [Formula: see text] at the state of electron spin polarization. The magnetic moments of the doped systems weakened as the concentration of doped Co increased. The magnetic moments were derived from the coupling effects of [Formula: see text]–[Formula: see text]. The band gaps narrowed and the absorption spectrum exhibited a red shift. The inconsistencies of the band gaps and absorption spectrum at the states of electron spin polarization and nonspin polarization were first discovered in this research, and the sources of Co-doped ZnO magnetism were also reinterpreted.

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