Study of fluctuation induced conductivity on nano diamond doped bulk MgB₂ superconductor
by Intikhab A. Ansari, M. Shahabuddin, M. Husain, Arpita Vajpayee, V.P.S. Awana, H. Kishan
International Journal of Nano and Biomaterials (IJNBM), Vol. 2, No. 1/2/3/4/5, 2009

Abstract: Carbon doped materials play a vital role in modern solid-state electronics. Carbon can crystallise in the form of diamond and graphite due to the very versatile nature. The fluctuation effect of nano diamond (ND) on bulk MgB₂ system has been studied. The resistive transition broadening of all the employed samples decreases as the magnetic field increases. The result shows the temperature derivative of resistivity, dp/dT under the different magnetic field 0T ≤ H ≤ 8T of bulk ND-doped MgB₂ system. The fluctuation induced conductivity (FIC) for different ND doped MgB₂ samples are discussed under different magnetic fields 0T ≤ H ≤ 8T. The coherence length, ζ_c(0) for all possible cases in zero fields have been estimated and plotted. In this paper, we report the study of FIC of ND doped bulk MgB₂ system in presence of magnetic field 0T ≤ H ≤ 8T. Result shows the decrease of transition temperature as we increase the magnetic field in all doped samples. The temperature derivative of resistivity, dp/dT is also discussed in different magnetic field and different doping concentration. The results show variation of FIC in Δσ vs ε⁻¹ plot in different ND doped MgB₂ samples under the range of 0T ≤ H ≤ 8T. The calculated coherence length, ζ_c(0), slightly decreases when we increase the doping concentration for ND doped MgB₂ system at zero field.

Online publication date: Sat, 08-Aug-2009

The full text of this article is only available to individual subscribers or to users at subscribing institutions.

 
Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.

Pay per view:
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.

Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Nano and Biomaterials (IJNBM):
Login with your Inderscience username and password:

Username:        Password:          Forgotten your password?

Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.

If you still need assistance, please email subs@inderscience.com