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首页> 外文期刊>Japanese Journal of Applied Physics. Part 2, Letters >Growth of R-123 Phase Single Crystal Whiskers
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Growth of R-123 Phase Single Crystal Whiskers

机译:R-123相单晶晶须的生长

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摘要

Single-crystal whiskers of R_1Ba_2Cu_3O_x (R-123, R = La, Nd, Sm, Eu, Gd, Dy, Ho, Er, Tm, Yb and Lu) phase have been successfully grown by the Te- and Ca-doping method. The whiskers were grown from precursor pellets at just below their partial melting (peritectic) temperatures. The nominal composition of the R-123 whiskers is R_(1-u),Ba_(2-v),Ca_wCu_3O_x (u + v + w = 0, w > 0) with R and/or Ba sites being substituted by Ca. However, the amount of Te was less than the analytical limit. The critical temperatures of the R-123 whiskers were around 80 K, and among these whiskers those with larger R ionic radii such as Dy, Gd, Eu and Sm require post-annealing in an oxygen atmosphere.
机译:R_1Ba_2Cu_3O_x(R-123,R = La,Nd,Sm,Eu,Gd,Dy,Ho,Er,Tm,Yb和Lu)相的单晶晶须已通过Te和Ca掺杂方法成功生长。晶须是由前体颗粒在低于其部分熔融(包晶)温度下生长的。 R-123晶须的标称成分为R_(1-u),Ba_(2-v),Ca_wCu_3O_x(u + v + w =​​ 0,w> 0),其中R和/或Ba位被Ca取代。但是,Te量小于分析极限。 R-123晶须的临界温度约为80 K,在这些晶须中,那些具有较大R离子半径(例如Dy,Gd,Eu和Sm)的晶须需要在氧气气氛中进行后退火。

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