scholarly journals On the hydrogen induced cubic to-trigonal phase transition in R-H systems (R = trivalent rare-earth)

2000 ◽  
Vol 56 (s1) ◽  
pp. s353-s353
Author(s):  
G. Renaudin ◽  
P. Fischer ◽  
K. Yvon
Keyword(s):  
Phase Transition ◽  
Rare Earth ◽  
Trivalent Rare Earth ◽  
Trigonal Phase

INVESTIGATION OF THE SAMARIUM ROLE IN THE PHYSICAL PROPERTIES OF Sm0.5Re0.5Ba2Cu3O7−δ COMPOUNDS IN THE ORTHORHOMBIC AND TETRAGONAL STRUCTURES

1991 ◽  
Vol 05 (14n15) ◽  
pp. 969-984 ◽  
Author(s):  
N. GUSKOS ◽  
W. LIKODIMOS ◽  
C. A. LONDOS ◽  
Ch. TRIKALINOS ◽  
A. KOUFOUDAKIS ◽  
...  
Keyword(s):  
Phase Transition ◽  
Rare Earth ◽  
Superconducting Phase ◽  
Rare Earth Ions ◽  
Epr Spectrum ◽  
Rare Earth Ion ◽  
Low Field ◽  
Trivalent Rare Earth ◽  
Epr Signal ◽  
Superconducting Phase Transition

Perovskites of type Sm 0.5 Re 0.5 Ba 2 Cu 3 O 7−δ (Re=Y, La, Nd, Eu, Gd, Dy, Ho, Er, Tm, Yb, and Lu) have been investigated by XRD, magnetic and EPR measurements in both orthorhombic and tetragonal phases. In the former case the usual superconducting phase transition in the range 90 to 95 K has been detected. In all the compounds an EPR spectrum of Cu 2+ ions has been observed. In the tetragonal phase, the EPR spectra of trivalent rare earth ions have been recorded for some members of the series. The observation of a broad EPR signal, tentatively attributed to superexchange interaction over the oxygen bridges < O 2), has also been recorded. Furthermore, the intensity of low-field microwave absorption has been found to depend strongly on the nature of the substituted rare earth ion at the sites of Y ions of the YBa 2 Cu 3 O 7−δ type compounds.

Kathodo- und Photolumineszenz der Seltenerd-aktivierten Wirtsgitter Ba2La2B2+Te2O12 (B = Zn, Mg)

1986 ◽  
Vol 41 (6) ◽  
pp. 866-870 ◽  
Author(s):  
H.-D. Autenrieth ◽  
S. Kemmler-Sack
Keyword(s):  
Electronic Structure ◽  
Rare Earth ◽  
Visible Region ◽  
Host Lattice ◽  
Rare Earth Ions ◽  
New Host ◽  
Emission Efficiency ◽  
Transfer Processes ◽  
Trivalent Rare Earth ◽  
Host Lattices

By activation of the new host lattices Ba2La2B2+Te2O12 (B = Zn, Mg) with trivalent rare earth ions Ln3+ = Pr. Sm, Eu, Tb, Dy, Ho, Tm an emission in the visible region is observed. The influence of the electronic structure and concentration on the relative emission efficiency as well as the host lattice participation in the energy transfer processes are discussed.

Tunable emissions via the white region from Sr2Gd8(SiO4)6O2:RE3+ (RE3+: Dy3+, Tm3+, Eu3+) phosphors

2016 ◽  
Vol 40 (7) ◽  
pp. 6214-6227 ◽  
Author(s):  
Gattupalli Manikya Rao ◽  
G. Seeta Rama Raju ◽  
Sk. Khaja Hussain ◽  
E. Pavitra ◽  
P. S. V. Subba Rao ◽  
...  
Keyword(s):  
Rare Earth ◽  
White Light ◽  
Host Lattice ◽  
Rare Earth Ions ◽  
White Region ◽  
Light Region ◽  
Trivalent Rare Earth ◽  
Co Doped

Sr2Gd8(SiO4)6O2 is an excellent host lattice for tunable emissions via the white-light region when co-doped with suitable trivalent rare-earth ions.

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