نویسندگان
دانشکده فیزیک دانشگاه صنعتی اصفهان، اصفهان
چکیده
نمونه‌های ابررسانای دما- بالای
Y1-xNixBa2Cu3O7-δ
با اضافه کردن ناخالصی
Ni در جایگاه Yبا مقادیر x=0, 0.002, 0.006, 0.01 به روش استاندارد واکنش حالت جامد ساخته شدند. آنالیز پراش پرتوی ایکس نمونه‌ها نشان می‌دهد که نمونه‌ها تک‌فاز بوده و فاز 123 تشکیل شده است. پذیرفتاری مغناطیسی ACنمونه‌ها تحت دو میدان مغناطیسی متفاوت
A/m 8/0 و A/m 400 400 اندازه‌گیری شد. نتایج نشان می‌دهد که با افزایش آلایش نیکل تا حد بهینه، اتصال بین دانه‌ها افزایش یافته و میخکوبی شار بهتر می‌شود.
کلیدواژه‌ها
عنوان مقاله [English]
Raising flux pinning by Ni substitution in YBa2Cu3O7-δ
نویسندگان [English]
- B Hadisichani
- H Shakeripour
- H Salamati
چکیده [English]
The high-Tc Y1-xNixBa2Cu3O7-δ samples doped by Ni for Y atom, with x=0, 0.002, 0.004, 0.006 and 0.01 were synthesized by the standard solid-state reaction method. The XRD diffraction of samples showed no impurity phase in all samples. Magnetic susceptibility of the samples under two different magnetic fields of 0.8 and 400 A/m was measured. The results showed that by increasing nickel element to an optimum value, the intragranular connection and flux pinning were improved.
کلیدواژه‌ها [English]
- high-Tc superconductor
- magnetic susceptibility
- flux pinning
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