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用13MeV的质子在注量为8.1×10~(15)—2.5×10~(17)H~+/cm~2范围内照射了高T_c超导薄膜Bi—Pb—Sr—Ca—Cu—O(照射时样品温度保持在100K),引起了电阻率ρ,T_c,T_(offset)(超导电阻完全转变的温度)和转变宽度δ_(Tc)的明显变化(见图1)。在照射注量低于2.8×10~(15)H~+/cm~2下T_c和δ_(Tc)没有发生变化,而ρ随注量的增加而超线性地增加。这就意
High-Tc superconducting thin films of Bi-Pb-Sr-Ca-Cu-O were irradiated with 13 MeV protons at a fluence of 8.1 × 10 ~ (15) -2.5 × 10 ~ (17) H ~ (The sample temperature is maintained at 100 K at the time of irradiation), causing significant changes in the resistivities ρ, T_c, offset (temperature at which the superconducting resistance completely changes) and the transition width δ_ (Tc) (see FIG. T_c and δ_ (Tc) did not change under the irradiation fluence of less than 2.8 × 10 ~ (15) H ~ + / cm ~ 2, while ρ increased linearly with the increase of fluence. This means