Low-temperature relaxation of metastable states and quantum tunneling in antiferromagnets with Ising rare-earth ions: Dysprosium orthoaluminate

2000 ◽  
Vol 42 (4) ◽  
pp. 722-725 ◽  
Author(s):  
I. B. Krynetskii ◽  
A. F. Popkov
Keyword(s):  
Rare Earth ◽  
Low Temperature ◽  
Quantum Tunneling ◽  
Rare Earth Ions ◽  
Metastable States ◽  
Temperature Relaxation

Influence of Sintering Temperature on the Thermoluminescence Spectra of MgSO4 Doped with RE(Tm,Dy) and Mn

2014 ◽  
Vol 664 ◽  
pp. 57-61
Author(s):  
Jing Yuan Guo ◽  
Qiang Tang ◽  
Li Gao ◽  
Ting Ting Lan ◽  
Chun Xiang Zhang ◽  
...  
Keyword(s):  
Rare Earth ◽  
High Temperature ◽  
Low Temperature ◽  
Sintering Temperature ◽  
Complex Structure ◽  
Rare Earth Ions ◽  
3 Dimensional ◽  
Luminescence Process ◽  
Co Doped ◽  
The Rare Earth

In this paper, MgSO4:Dy,MgSO4:Tm and MgSO4:Mn phosphors are prepare by high temperature solid state reaction. The MgSO4:Dy or MgSO4:Tm powder are mixed and sintered with MgSO4:Mn respectively to obtain the co-doped MgSO4:Dy,Mn and MgSO4:Tm,Mn phosphors. The 3-dimensional thermoluminescence spectra of these two phosphors under different sintering temperature are measured.Results show that when the sintering temperature is below 800°C, Dy, Tm and Mn ions emissions are independent. However, when the sintering temperature was over 800°C, the emission peak of Mn becomes weaker, and so do the low temperature peaks of Dy and Tm, while the high temperature peaks of Dy and Tm become stronger. This indicated that the defect complex structure in the formation of the thermoluminescence material depends on the sintering temperature. As the sintering temperature rises, more and more Mn ions combine with the rare earth ions. Therefore, the luminescence process of the energy transfer of Mn ions to the rare earth ions can be observed and the suppression to low temperature peaks of Tm and Dy, and also shown in spectra.

Low-temperature photoluminescence in chalcogenide glasses doped with rare-earth ions

2015 ◽  
Vol 648 ◽  
pp. 237-243 ◽  
Author(s):  
Petr Kostka ◽  
Jiří Zavadil ◽  
Mihail S. Iovu ◽  
Zoya G. Ivanova ◽  
David Furniss ◽  
...  
Keyword(s):  
Rare Earth ◽  
Low Temperature ◽  
Chalcogenide Glasses ◽  
Rare Earth Ions ◽  
Low Temperature Photoluminescence

Low-Temperature Optical Dephasing of Rare-Earth Ions in Glass

1984 ◽  
Vol 52 (25) ◽  
pp. 2281-2284 ◽  
Author(s):  
D. L. Huber ◽  
M. M. Broer ◽  
B. Golding
Keyword(s):  
Rare Earth ◽  
Low Temperature ◽  
Rare Earth Ions ◽  
Optical Dephasing

Low-temperature proton spin–lattice relaxation maxima of lanthanum hydrides doped with paramagnetic rare earth ions

2004 ◽  
Vol 16 (34) ◽  
pp. 6147-6158 ◽  
Author(s):  
S Leyer ◽  
R G Barnes ◽  
C Buschhaus ◽  
G Fischer ◽  
B Pilawa ◽  
...  
Keyword(s):  
Rare Earth ◽  
Low Temperature ◽  
Lattice Relaxation ◽  
Proton Spin ◽  
Rare Earth Ions ◽  
Spin Lattice Relaxation ◽  
Spin Lattice

Low-temperature optical dephasing of rare-earth ions in inorganic glasses

1986 ◽  
Vol 33 (6) ◽  
pp. 4160-4165 ◽  
Author(s):  
M. M. Broer ◽  
B. Golding ◽  
W. H. Haemmerle ◽  
J. R. Simpson ◽  
D. L. Huber
Keyword(s):  
Rare Earth ◽  
Low Temperature ◽  
Rare Earth Ions ◽  
Inorganic Glasses ◽  
Optical Dephasing

scholarly journals Thermoluminescence Enhancement of LiMgPO4 Crystal Host by Tb3+ and Tm3+ Trivalent Rare-Earth Ions Co-doping

Materials ◽  
2019 ◽  
Vol 12 (18) ◽  
pp. 2861 ◽  
Author(s):  
Wojciech Gieszczyk ◽  
Barbara Marczewska ◽  
Mariusz Kłosowski ◽  
Anna Mrozik ◽  
Paweł Bilski ◽  
...  
Keyword(s):  
Rare Earth ◽  
Low Temperature ◽  
Luminescent Properties ◽  
Rare Earth Ions ◽  
Crystal Sample ◽  
Temperature Range ◽  
Co Doping ◽  
Trivalent Rare Earth ◽  
Recombination Centers ◽  
Lower Temperature

We investigated the influence of terbium and thulium trivalent rare-earth (RE) ions co-doping on the luminescent properties enhancement of LiMgPO4 (LMP) crystal host. The studied crystals were grown from the melt by micro-pulling-down (MPD) technique. Luminescent properties of the obtained crystals were investigated by thermoluminescence (TL) method. The most favorable properties and the highest luminescence enhancement were measured for Tb and Tm double doped crystals. A similar luminescence level can be also obtained for Tm, B co-doped samples. In this case, however, the low-temperature TL components have a significant contribution. The measured luminescent spectra showed a typical emission of Tb3+ and Tm3+ ions of an opposite trapping nature, namely the holes and electron-trapping sites, respectively. The most prominent transitions of 5D4 → 7F3 (550 nm for Tb3+) and 1D2 → 3F4 (450 nm for Tm3+) were observed. It was also found that Tb3+ and Tm3+ emissions show temperature dependence in the case of double doped LMP crystal sample, which was not visible in the case of the samples doped with a single RE dopant. At a low temperature range (up to around 290 °C) Tm3+ emission was dominant. At higher temperatures, the electrons occupying Tm3+ sites started to be released giving rise to emissions from Tb-related recombination centers, and emissions from Tm3+ centers simultaneously decreased. At the highest temperatures, emission took place from Tb3+ recombination centers, but only from deeper 5D4 level-related traps which had not been emptied at a lower temperature range.

Sign in / Sign up

Export Citation Format

Share Document