DC magnetization studies in Nb/Fe superconducting multilayers

Chaudhari, S. M. ; Chaudhary, Sujeet ; Roy, S. B. ; Chaddah, P. ; Dasannacharya, B. A. (2001) DC magnetization studies in Nb/Fe superconducting multilayers Vacuum: Surface Engineering, Surface Instrumentation & Vacuum Technology, 60 (4). pp. 407-410. ISSN 0042-207X

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Official URL: http://linkinghub.elsevier.com/retrieve/pii/S00422...

Related URL: http://dx.doi.org/10.1016/S0042-207X(00)00156-1


The behavior of superconducting transition temperature TC in superconducting/ferromagnetic (S/F) multilayers as a function of different layer thicknesses and for varying magnetic moment μB of the F layer atoms is studied. Multilayer structures consist of five bilayers of constant superconducting Nb layer thickness of 400 Å and Fe of 6 and 24 Å each. The analysis of the magnetization data revealed that for tFe=6 Å, the Fe layer is non-magnetic. The interpretation of the observed TC behavior is attributed to the change of the interaction of the cooper pairs with this layer at the onset of ferromagnetism for tFe=6 Å. The hysteresis curve recorded under isothermal conditions at 4.5 K for [Nb (400 Å)/Fe (6 Å)]5 multilayers shows the usual M-H hysteresis behavior which is typical of a hard type-II superconductor exhibiting an irreversibility field Hirr of 3.5 kOe with substantial pinning at lower field. In addition, [Nb(400 Å)/Fe(6 Å)]5 multilayer displays anomalous behavior in the form of paramagnetic peak in the superconducting state just below the transition temperature TC=6.25 K.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Magnetization; Multilayer; Superconductivity
ID Code:10199
Deposited On:03 Nov 2010 04:34
Last Modified:19 May 2011 12:02

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