A Study of Spin-Phonon Interactions by Spin-Lattice Relaxation Processes

1976 ◽  
pp. 214-216
Author(s):  
C. A. Bates ◽  
A. Gavaix ◽  
P. Steggles ◽  
H. Szymczak ◽  
A. Vasson ◽  
...  
Keyword(s):  
Lattice Relaxation ◽  
Spin Lattice Relaxation ◽  
Relaxation Processes ◽  
Spin Lattice

Spin-lattice relaxation processes of transition metal ions in a heavily cobalt doped ZnO: Phonon heating effect

2019 ◽  
Vol 126 (12) ◽  
pp. 123903
Author(s):  
D. V. Azamat ◽  
A. G. Badalyan ◽  
P. G. Baranov ◽  
M. Fanciulli ◽  
J. Lanc̆ok ◽  
...  
Keyword(s):  
Transition Metal ◽  
Metal Ions ◽  
Lattice Relaxation ◽  
Transition Metal Ions ◽  
Spin Lattice Relaxation ◽  
Relaxation Processes ◽  
Heating Effect ◽  
Spin Lattice ◽  
Doped Zno

Spin-Gitter-Relaxation im Triplett-Zustand von Chinoxalin in Perdeutero-Naphthalin und zwei ähnlichen Mischkristallen

1975 ◽  
Vol 30 (6-7) ◽  
pp. 754-770 ◽  
Author(s):  
U. Konzelmann ◽  
D. Kilpper ◽  
M. Schwoerer
Keyword(s):  
Triplet State ◽  
Deep Trap ◽  
Lattice Relaxation ◽  
Relaxation Mechanism ◽  
Mixed Crystals ◽  
Spin Lattice Relaxation ◽  
Relaxation Processes ◽  
Shallow Trap ◽  
Field Range ◽  
Spin Lattice

Abstract Spin Lattice Relaxation in the Triplet State of Qainoxaline in Perdeuteronaphthalene and of two Similar Mixed Crystals The spin lattice relaxation in the excited triplet state of three mixed crystals was investigated: Quinoxaline in perdeutero-naphthalene, quinoxaline in naphthalene (X-traps) and quinoxaline in durene. They differ by the depth of their traps, which are shallow (90 cm -1), very shallow (60 cm -1) and deep (6600 cm -1), respectively. In order to identify the relaxation processes and the relaxation mechanism, the experiments were performed in the large magnetic field range be-tween 0.2 T and 5.4 T. By use of a non-resonant optical method and by ESR and ODMR it could be shown that at high fields the direct process (emission of resonant phonons) is the only efficient process up to 4.2 K. At low fields Raman-processes are dominant. Thereby the spin lattice relaxation probability per unit time, w, increases with the ninth power of the temperature in the shallow trap systems and with the fifth power in the deep trap system. By the analysis of the very strong anisotropy of w it could be shown that the efficient relaxation mechanism in the shallow trap systems is a guest-host-interaction modulated by phonons.

Molecular dynamics of poly(ethylene terephthalate)/poly(phenylene sulfide) nanocomposites with barium titanate

Open Physics ◽  
2011 ◽  
Vol 9 (2) ◽  
Author(s):  
Monika Konieczna ◽  
Aneta Woźniak-Braszak ◽  
Krystyna Hołderna-Natkaniec ◽  
Jan Jurga
Keyword(s):  
Barium Titanate ◽  
Ethylene Terephthalate ◽  
Lattice Relaxation ◽  
Lattice Relaxation Time ◽  
Spin Lattice Relaxation ◽  
Relaxation Processes ◽  
Spin Lattice ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene ◽  
Phenylene Sulfide

AbstractThe relaxation processes and the properties of polymer/ceramic nanocomposites have been studied by the 1H nuclear magnetic resonance methods. Nanocomposites of poly(ethylene terephthalate) PET and poly(phenylene sulfide) PPS with 0.25, 2.5 and 5% wt. barium titanate BT were prepared using a twin screw extruder and injection moulding machine. The spin-lattice relaxation time T1, second moment M2 and the motional parameters as e.g. the activation energies in the nanocomposites were investigated.

One- and two-particle spin-lattice relaxation processes in ferroelectrics

1992 ◽  
Vol 129 (1) ◽  
pp. 93-100 ◽  
Author(s):  
Yu. G. Kubarev ◽  
A. L. Larionov
Keyword(s):  
Lattice Relaxation ◽  
Spin Lattice Relaxation ◽  
Relaxation Processes ◽  
Particle Spin ◽  
Spin Lattice

High-field studies of spin-lattice relaxation processes in an optically excited Kramers doublet of LaF3:Er3+

1983 ◽  
Vol 27 (1) ◽  
pp. 79-84 ◽  
Author(s):  
H. P. Sandner ◽  
H. Wolfrum ◽  
W. Eisfeld ◽  
K. F. Renk
Keyword(s):  
High Field ◽  
Lattice Relaxation ◽  
Field Studies ◽  
Spin Lattice Relaxation ◽  
Relaxation Processes ◽  
Spin Lattice ◽  
Kramers Doublet
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