Mukhopadhyay, Sourin ; Joshi, D. A. ; Raychaudhuri, Pratap ; Tomy, C. V. (2008) Point contact Andreev reflection studies on the low ferromagnet using a superconducting Nb tip Physica B: Condensed Matter, 403 (5-9). pp. 1017-1019. ISSN 0921-4526
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Official URL: http://www.sciencedirect.com/science/article/pii/S...
Related URL: http://dx.doi.org/10.1016/j.physb.2007.10.345
Abstract
We report measurement of transport spin polarization (Pt) using point contact Andreev reflection (PCAR) spectroscopy on NdNi5, a ferromagnet with Curie temperature of TCurie∼7.7K, using superconducting Nb tip (Tc∼9.2K). 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.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| Keywords: | NdNi5; Point Contact Andreev Reflection Spectroscopy; Transport Spin Polarization |
| ID Code: | 105208 |
| Deposited On: | 25 Dec 2017 12:11 |
| Last Modified: | 25 Dec 2017 12:11 |
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