The effect of composition and neutron irradiation on the upper critical field of Nb3Pt

✍ Scribed by S. E. Lambert; M. B. Maple; A. R. Sweedler; S. Moehlecke

• Publisher: Springer US
• Year: 1980
• Tongue: English
• Weight: 391 KB
• Volume: 41
• Category: Article
• ISSN: 0022-2291
• DOI: 10.1007/bf00114371

✦ Synopsis

The upper critical field Hc2(T) of the A15 compound has been measured as a function of temperature T for various compositions and levels of irradiation with fast reactor neutrons. Compositions ranging from 19 to 29 at % Pt and neutron fluences up to 16 • 101Sn/cme (E> 1 Me V) were studied. A sto&hiometric sample that had been rapidly quenched from the liquid ("splat-cooled") was also investigated. For the unirradiated samples, Tc exhibits a maximum of 10.4 K at the stoichiometric composition, while both Hce(O) and dH~2(T)/dT[T=To attain their maximum values on the Pt-rich side of stoichiometry. The irradiated samples show a decrease of Hoe(O) with increasing neutron fluence. The results are discussed in terms of antisite disorder and a strong correlation is obtained between decreasing Hc2(O) and increasing disorder of the Nb atomic sites.