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| 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 |
| Appears in Collections: | Article
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