Hydrogen-induced decomposition in Pr(Co 1− xCu x) 5 intermetallic compounds

Quasi-binary Pr(Co 1− x Cu x ) 5 intermetallics with 0≤ x≤1 were hydrogenated at elevated temperatures to precipitate Co and Cu and to study their mutual solubility. Low temperature hydrogenation was found to form a CaCu 5-type hydride containing about 1.6 hydrogen atoms per formula unit. Above 500...

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Bibliographic Details
Published in:Journal of alloys and compounds 1997, Vol.260 (1), p.12-16
Main Authors: Mushnikov, N.V., Yermakov, A.Ye, Zajkov, N.K., Shtolz, A.K.
Format: Article
Language:English
Subjects:
Crystal structure
Decomposition
Hydrogenation
Magnetic properties
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Summary:Quasi-binary Pr(Co 1− x Cu x ) 5 intermetallics with 0≤ x≤1 were hydrogenated at elevated temperatures to precipitate Co and Cu and to study their mutual solubility. Low temperature hydrogenation was found to form a CaCu 5-type hydride containing about 1.6 hydrogen atoms per formula unit. Above 500 °C, the samples decompose into PrH 2.6, Cu and h.c.p.-Co. In the temperature range 330–450 °C, the CaCu 5-type hydrides coexist with the decomposed phases. Structural and magnetic measurements indicate that no solid solution are formed in Co-Cu decomposed phases. The magnetoresistance on both parent and hydrogenated samples does not exceed 0.5%.
ISSN:0925-8388
1873-4669
DOI:10.1016/S0925-8388(97)00126-6