اثر آلایش جزئی Nb بر رفتار مغناطیسی و الکتریکیابررسانای ۱۲۳-Y با CuO نانومتری

حاجیلو, راحله; صدقی, حسن

doi:10.47176/ijpr.21.3.31031

اثر آلایش جزئی Nb بر رفتار مغناطیسی و الکتریکیابررسانای ۱۲۳-Y با CuO نانومتری

نوع مقاله : مقاله پژوهشی

نویسندگان

راحله حاجیلو ¹

حسن صدقی ²

¹ مرکز پژوهش ابررسانایی،گروه فیزیک، دانشکده علوم، دانشگاه ارومیه

² استاد-دانشگاه ارومیه

https://doi.org/10.47176/ijpr.21.3.31031

چکیده

اثر آلایش نئوبیوم و CuO نانومتری (nm۴۰) بر ترکیبات Y₁-xNbxBa₂Cu₃O₇-∂ با 0/00 ≤ x ≤ 0/05 wt، که با روش حالت جامد متعارف تهیه‌ شده‌اند را با استفاده از اندازه‌گیری‌های XRD، SEM، R(T)، و حلقه مغناطیسی (M-H) بررسی کرده‌ایم. از حلقه‌های پسماند تا Kg ۱ در بازه دمایی
K۱۰-۶۰، چگالی‌های جریان بحرانی بر حسب دما با استفاده از مدل حالت بحرانی به دست آمده است. میخکوبی شار مغناطیسی Fp نمونه‌ها با استفاده از نیروی لورنتسی به دست آمده است. وابستگی منحنی‌های اندازه‌گیری مقاومت الکتریکی به دما بیان می‌کند که نمونه با wt% x=0/01 دمای گذار Tc بالایی دارد. بررسی XRD نشان می‌دهد که نمونه‌‌های آلاییده- Nb دارای پارامتر شبکه c کوچک‌تر و راست‌لوزی (اورتورمبیک) بودن بیشتر از ۱۲۳-Y خالص هستند. همچنین از اندازه‌گیری‌های Jc و Fp مشخص شد که جایگزینی Nb به میزان wt%0/01 به جای Y در ابررسانای YBCO مقادیر Jc و Fp را ارتقا می‌دهد

کلیدواژه‌ها

High-Tc superconductors

X-ray

Critical current density (Jc)

Flux pinning (Fp)

عنوان مقاله English

The effect of partial Nb doping on magnetic and electrical behavior of Y-123 superconductors with Nano CuO

نویسندگان English

R Hajilou ¹

H Sedghi ²

¹ Superconductivity Research Center, Department of Physics, Faculty of Science, Urmia University, Urmia, Iran

² Superconductivity Research Center, Department of Physics, Faculty of Science, Urmia University, Urmia, Iran

چکیده English

: We have investigated the effect of Niobium and Nano CuO (40 nm) dopingY1-xNbxBa2Cu3O7-∂ compounds with 0.00 ≤ x ≤ 0.05 wt. %, prepared by the conventional solid-state method by means of XRD, SEM, R(T) and magnetic loops (M-H) measurements. The critical current densities, Jc as a function of temperature have been calculated using the critical state model from the hysteresis loops up to 1 kG at the temperature range of 10-60 K. Magnetic flux pinning, Fp of samples was calculated by using Lorentz force. The temperature dependence of the electrical resistivity measurement curves indicated that the sample with x=0.01 wt.% has a high transition temperature, Tc. XRD analysis shows a shorter c axis lattice parameter and higher orthoromthcity than the pure Y-123 and other Nb-doped samples. It was also found from Jc and Fp measurement, that the 0.01 wt.% Nb substation for the Y on YBCO superconductor improves the Jc and Fp.

کلیدواژه‌ها English

High-Tc superconductors

X-ray

Critical current density (Jc)

Flux pinning (Fp)

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