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Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/10054/1281

Title: Point contact Andreev reflection studies on the low TCurie ferromagnet NdNi5 using a superconducting Nb tip
Authors: MUKHOPADHYAY, SOURIN
JOSHI, DA
RAYCHAUDHURI, PRATAP
TOMY, CV
Keywords: curie temperature
magnetisation
nickel alloys
point contacts
Issue Date: 2008
Publisher: Elsevier
Citation: Physica B: Condensed Matter 403(5-9), 1017-1019
Abstract: We report measurement of transport spin polarization (Pt) using point contact Andreev reflection (PCAR) spectroscopy on NdNi5, a ferromagnet with Curie temperature of View the MathML source, using superconducting Nb tip View the MathML source. Detail analysis of the spectra shows that the normalized value of Pt(=Pt(T)/Pt(T=0)) for contacts with different Z follows closely the temperature variation of spontaneous magnetization, though the value of Pt decreases with increasing Z. We also observe a large decrease in superconducting quasiparticle lifetime arising from critical spin fluctuations close to the Curie temperature of the ferromagnet.
URI: 10.1016/j.physb.2007.10.345
http://hdl.handle.net/10054/1281
http://dspace.library.iitb.ac.in/xmlui/handle/10054/1281
ISSN: 0921-4526
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