Comparison of irreversibility temperature determined via DC and AC magnetisation techniques in conventional superconductors

Grover, A. K. ; Ramakrishnan, S. ; Kumar, Ravi ; Paulose, P. L. ; Malik, S. K. ; Chaddah, P. (1991) Comparison of irreversibility temperature determined via DC and AC magnetisation techniques in conventional superconductors Pramana - Journal of Physics, 37 (6). pp. 525-538. ISSN 0304-4289

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Official URL: http://www.ias.ac.in/j_archive/pramana/37/6/525-53...

Related URL: http://dx.doi.org/10.1007/BF02846783

Abstract

A comparison has been made of irreversibility temperature determined by four different methods in few specimens of lead (type-I) and niobium (type-II). The merger of MZFC(T) and MFC(T) curves give Tr(H) values lower than those evident from vanishing the hysteresis in isothermal DC magnetization. The identification of peak temperature in χ"H(T) data with Tr(H) is appropriate only if the contribution from changes in the normal state electrodynamics can be isolated and the peak is narrow. The appearance of differential paramagnetic effect in χ'H(T) data is adequate to imply reversibility, however, its efficacy to precisely locate irreversibility line remains to be established.

Item Type:Article
Source:Copyright of this article belongs to Indian Academy of Sciences.
Keywords:Irreversibility Line; AC and DC Magnetization Techniques; Type-I and Type-II Superconductors
ID Code:84819
Deposited On:27 Feb 2012 12:16
Last Modified:19 May 2016 01:06

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