High field magnetoresistance of silver containing rare-earth impurities

1979 ◽  
Vol 40 (C5) ◽  
pp. C5-40-C5-41
Author(s):  
J. C. Ousset ◽  
G. Creuzet ◽  
A. Fert
Keyword(s):  
Rare Earth ◽  
High Field ◽  
Rare Earth Impurities

Excitonic Mechanism of Rare Earth Excitation in II-VI and IH-V Semiconductors

1992 ◽  
Vol 262 ◽  
Author(s):  
Marek Godlewski
Keyword(s):  
Rare Earth ◽  
High Field ◽  
Impact Ionization ◽  
Excitation Mechanism ◽  
Carrier Trapping ◽  
Rare Earth Doped ◽  
Rare Earth Impurities ◽  
Excitonic Mechanism

ABSTRACTIn this paper we analyze processes which may improve the efficiency of low- and high- field electroluminescence devices based on rare earth doped II-VI and III-V semiconductors. The main topicsare the processes which follow impact ionization, i.e., carrier trapping and/or exciton binding. Excitonic excitation mechanism is shown to occur also for ions which are not directly ionized, as observed recently for some rare earth impurities in II-VI and III-V semiconductors.

High-field magnetoresistance of noble metals containing rare-earth impurities

1981 ◽  
Vol 24 (1) ◽  
pp. 7-22 ◽  
Author(s):  
J.C. Ousset ◽  
G. Carrere ◽  
J.P. Ulmet ◽  
S. Askenazy ◽  
G. Creuzet ◽  
...  
Keyword(s):  
Rare Earth ◽  
High Field ◽  
Noble Metals ◽  
Rare Earth Impurities

Study of segregation in La1.8Sr0.2CuO4 superconductor by STEM-EDS microanalysis

1987 ◽  
Vol 45 ◽  
pp. 54-55
Author(s):  
T. F. Kelly ◽  
P. J. Lee ◽  
E. E. Hellstrom ◽  
D. C. Larbalestier
Keyword(s):  
Rare Earth ◽  
High Field ◽  
Transport Current ◽  
Total Thickness ◽  
New Class ◽  
Ceramic Superconductors ◽  
Current Densities ◽  
Group Ii ◽  
Eds Microanalysis

Recently there has been much excitement over a new class of high Tc (>30 K) ceramic superconductors of the form A1-xBxCuO4-x, where A is a rare earth and B is from Group II. Unfortunately these materials have only been able to support small transport current densities 1-10 A/cm2. It is very desirable to increase these values by 2 to 3 orders of magnitude for useful high field applications. The reason for these small transport currents is as yet unknown. Evidence has, however, been presented for superconducting clusters on a 50-100 nm scale and on a 1-3 μm scale. We therefore planned a detailed TEM and STEM microanalysis study in order to see whether any evidence for the clusters could be seen.A La1.8Sr0.2Cu04 pellet was cut into 1 mm thick slices from which 3 mm discs were cut. The discs were subsequently mechanically ground to 100 μm total thickness and dimpled to 20 μm thickness at the center.

Resistance Anomaly in Palladium‐Silver Alloys Containing Rare Earth Impurities

1968 ◽  
Vol 39 (2) ◽  
pp. 1243-1243
Author(s):  
C. W. Chen ◽  
L. Roger Edwards ◽  
Sam Legvold
Keyword(s):  
Rare Earth ◽  
Silver Alloys ◽  
Rare Earth Impurities ◽  
Palladium Silver ◽  
Resistance Anomaly

ESR of rare-earth impurities (Gd, Dy, Er) in Ce: A study of the α-cerium magnetic properties

1978 ◽  
Vol 25 (8) ◽  
pp. 543-546 ◽  
Author(s):  
C. Rettori ◽  
D. Davidov ◽  
J. Suassuna ◽  
G.E. Barberis ◽  
B. Elschner ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Rare Earth ◽  
Rare Earth Impurities

scholarly journals Influence of Sample Pretreatment on the Analysis of High Contents of Rare-Earth and High Field Strength Elements in Geological Samples by ICP-AES and ICP-MS (Case Study of the Tomtor Deposit)

2020 ◽  
pp. 593-605
Author(s):  
Bagai-ool Yu. Saryg-ool ◽  
Lidiya N. Bukreeva ◽  
Irina N. Myagkaya ◽  
Aleksandr V. Tolstov ◽  
Elena V. Lazareva ◽  
...  
Keyword(s):  
Rare Earth ◽  
Field Strength ◽  
Inductively Coupled Plasma ◽  
High Field ◽  
Sample Pretreatment ◽  
Emission Spectrometry ◽  
Geological Samples ◽  
High Field Strength ◽  
Inductively Coupled ◽  
Icp Ms

Influence of sample pretreatment on the analysis of the high contents of rare earth (REE) and high field strength (HFSE) elements in geological samples by inductively coupled plasma atomic emission spectrometry (ICP-AES) and inductively coupled plasma mass spectrometry (ICP-MS) was studied. The rocks and rich ores of the Tomtor Nb-REE deposit were explored. Complete dissolution of the geological samples with a high content of “refractory” minerals has been achieved using fusion with a sodium peroxide. The results obtained by ICP-AES and ICP-MS after chemical dissolution are comparable with the results obtained by the XRF-SR without chemical pretreatment

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