Marked matrix effect on spin polarization of biacetyl 3n.pi. state in low-temperature matrixes

1985 ◽  
Vol 89 (23) ◽  
pp. 4921-4925 ◽  
Author(s):  
Takashi Imamura ◽  
Osamu Onitsuka ◽  
Hisao Murai ◽  
Kinichi Obi
Keyword(s):  
Low Temperature ◽  
Spin Polarization ◽  
Matrix Effect

Conservation of spin-polarization during triplet-triplet energy transfer in low-temperature matrixes

1984 ◽  
Vol 88 (18) ◽  
pp. 4028-4031 ◽  
Author(s):  
Takashi Imamura ◽  
Osamu Onitsuka ◽  
Hisao Murai ◽  
Kinichi Obi
Keyword(s):  
Energy Transfer ◽  
Low Temperature ◽  
Spin Polarization ◽  
Triplet Energy ◽  
Triplet Energy Transfer

New Magnetoresistance Results in GdB6

2012 ◽  
Vol 190 ◽  
pp. 77-80 ◽  
Author(s):  
M.A. Anisimov ◽  
A.V. Bogach ◽  
V.V. Glushkov ◽  
S.V. Demishev ◽  
N.A. Samarin ◽  
...  
Keyword(s):  
Experimental Data ◽  
Magnetic Susceptibility ◽  
Low Temperature ◽  
Spin Polarization ◽  
Complex Behavior ◽  
Negative Component ◽  
High Quality ◽  
Wide Range ◽  
Linear And Nonlinear ◽  
Local Spin Polarization

Detailed study of transverse magnetoresistance (MR) and magnetic susceptibility have been done on the high quality single crystals of antiferromagnet GdB6 (TN15.5K) in the wide range of temperatures 2-40K in magnetic fields up to 8T. The data obtained allow to establish the low temperature antiferromagnetic (AFMII) phase below T*~4.7K with the complex behavior of MR including the field hysteresis of the magnetoresistance. It was shown that MR behavior depends on the cooling-warming prehistory in AFM state of GdB6. The analysis of experimental data allowed us to deduce three contributions to MR in AFM(I), (T*) and paramagnetic (PM) phases of GdB6. In addition to the main negative component Δρ˿ρ~ H2 interpreted in terms of Yosida model both the linear and nonlinear magnetic contributions were also established. The anomalies of MR found in AFM(I) state seem to be associated with the local spin polarization of 5d-electron states of Gd3+ ion.

scholarly journals Microscopic Observation of π Spin Polarization by d Localized Spin in λ Type BETS Based Organic Superconductors

Crystals ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 1055
Author(s):  
Ko-ichi Hiraki ◽  
Toshihiro Takahashi ◽  
Hiroshi Akiba ◽  
Yutaka Nishio ◽  
Biao Zhou
Keyword(s):  
Magnetic Field ◽  
Low Temperature ◽  
Spin Polarization ◽  
Organic Superconductors ◽  
Exchange Field ◽  
Superconducting Transition ◽  
Nmr Spectrum ◽  
Fe Sites ◽  
Low Magnetic Field ◽  
Ga Doping

In this study, 77Se NMR measurements were carried out to detect the π spin polarization of the organic BETS (BETS = Bis(ethylenedithio)tetraselenafulvalene) molecule of the field induced superconductor, λ-(BETS)2Fe1−xGaxCl4, which shows a superconducting transition at relatively low magnetic field compared to the non-doped λ-(BETS)2FeCl4. From the analysis of the NMR spectrum at low temperature, it was clarified that the exchange interaction between π and 3d spins in the Ga doping system is smaller than that in the Fe salt. It is also clarified that the conduction π spins feel the “averaged” exchange field from the localized 3d spins at the dilute Fe sites.

Achievement of high nuclear spin polarization using lanthanides as low-temperature NMR relaxation agents

2013 ◽  
Vol 15 (20) ◽  
pp. 7586 ◽  
Author(s):  
David T. Peat ◽  
Anthony J. Horsewill ◽  
Walter Köckenberger ◽  
Angel J. Perez Linde ◽  
David G. Gadian ◽  
...  
Keyword(s):  
Low Temperature ◽  
Spin Polarization ◽  
Nuclear Spin ◽  
Nmr Relaxation ◽  
Nuclear Spin Polarization

Spin polarization of xenon films at low-temperature induced by

2003 ◽  
Vol 329-333 ◽  
pp. 437-438 ◽  
Author(s):  
N. Biškup ◽  
N. Kalechofsky ◽  
D. Candela
Keyword(s):  
Low Temperature ◽  
Spin Polarization

SPIN-POLARIZED ATOMIC HYDROGEN IN THE STATIC FLUCTUATION APPROXIMATION

2005 ◽  
Vol 19 (26) ◽  
pp. 3985-4008 ◽  
Author(s):  
B. R. JOUDEH ◽  
M. K. AL-SUGHEIR ◽  
H. B. GHASSIB
Keyword(s):  
Low Temperature ◽  
Spin Polarization ◽  
Temperature Region ◽  
Atomic Hydrogen ◽  
Unit Volume ◽  
Field Operator ◽  
Closed Set ◽  
Spin Polarized ◽  
Static Fluctuation Approximation ◽  
Static Fluctuation

In this paper we use the so-called static fluctuation approximation (SFA) to calculate the thermodynamic properties of spin-polarized atomic hydrogen. This approximation is based on the replacement of the square of the local-field operator with its mean value. A closed set of nonlinear integral equations is derived for neutral many-bosonic systems. This set is solved numerically by an iteration method for two triplet-state potentials: a Morse- and Silvera-type potentials. It is found that the mean internal energy per unit volume, the pressure, the entropy per unit volume, and the specific heat per unit volume increase with temperature and decrease with spin polarization in the low-temperature region (<8 mK ); whereas the condensate fraction increases with an applied magnetic field. It is also found that these quantities are nearly independent of spin polarization for high temperatures (>0.1 K ), and that they are independent of the number density up to 10-3Å-3 in the low-temperature region.

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