scholarly journals REACTIONS AND CATALYTIC PROPERTIES OF RARE EARTH METALS WITH UNSATURATED COMPOUNDS: SAMARIUM AND YTTERBIUM CATALYSTS FORMED IN LOW-TEMPERATURE MATRICES

1984 ◽  
Vol 13 (2) ◽  
pp. 203-204 ◽  
Author(s):  
Hayao Imamura ◽  
Akira Ohmura ◽  
Susumu Tsuchiya
Keyword(s):  
Rare Earth ◽  
Low Temperature ◽  
Catalytic Properties ◽  
Rare Earth Metals ◽  
Unsaturated Compounds

Catalytic properties of active rare earth metals formed in low temperature matrices

1983 ◽  
Vol 94 (1) ◽  
pp. 107-109 ◽  
Author(s):  
Hayao Imamura ◽  
Akira Ohmura ◽  
Takayoshi Tamura ◽  
Susumu Tsuchiya
Keyword(s):  
Rare Earth ◽  
Low Temperature ◽  
Catalytic Properties ◽  
Rare Earth Metals

Low‐Temperature Thermoelectric Power of the Rare‐Earth Metals

1961 ◽  
Vol 32 (12) ◽  
pp. 2543-2549 ◽  
Author(s):  
H. J. Born ◽  
Sam Legvold ◽  
F. H. Spedding
Keyword(s):  
Rare Earth ◽  
Low Temperature ◽  
Thermoelectric Power ◽  
Rare Earth Metals ◽  
The Rare Earth

Comparison of the Three Classes (Rare Earth, Refractory and Near-Noble) of Silicide Contacts

1981 ◽  
Vol 10 ◽  
Author(s):  
R. D. Thompson ◽  
K. N. Tu
Keyword(s):  
Rare Earth ◽  
Low Temperature ◽  
Tensile Stress ◽  
Noble Metals ◽  
Schottky Barrier Height ◽  
Rare Earth Metals ◽  
The Other ◽  
Severe Problem ◽  
New Class ◽  
Motion Study

It is well established that near-noble metals and refractory metals form two distinct classes of silicide contacts with silicon. Rare earth metals have been studied in the same manner and found to form a new class that is very distinct from the other two in terms of properties and characteristics. Some of these characteristics are the formation of a disilicide phase, as an apparently first and last phase, at a surprisingly low temperature (250–400°C). Marker motion study using implanted krypton and argon showed silicon to be the dominant diffusing species for ErSi2. The Schottky barrier height to n-Si is 0.40 ± 0.04 eV and to p-Si is 0.70 ± 0.04 eV for all six of the metals studied. The surface morphology after reaction indicates the formation of a tensile stress by the silicide reaction. Oxidation of the rare earth metals is a severe problem although a variety of passivation schemes have been shown to work.

The 1-N amides 1∞[Eu2(Pyr)4(PyrH)2(NH3)] · PyrH and [Yb2(Cbz)4(NH2)2(NH3)4] · 3CbzH: Distinctions in the crystal structures, thermal properties and ammonolysis tendency

2005 ◽  
Vol 220 (2/3) ◽  
Author(s):  
Klaus Müller-Buschbaum ◽  
Caterina C. Quitmann
Keyword(s):  
Thermal Properties ◽  
Rare Earth ◽  
Low Temperature ◽  
Crystal Structures ◽  
Liquid Ammonia ◽  
Rare Earth Metals ◽  
Low Temperature Oxidation ◽  
Temperature Oxidation ◽  
The Rare Earth

AbstractThe low-temperature oxidation of the rare earth metals europium and ytterbium with the 1-N amines pyrrole and carbazole in liquid ammonia gave the pyrrolate

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