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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