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Investigation of the quaternary Fe2 − xCoxMnSi (0 ≤ x ≤ 0.6) alloys by structural, magnetic, resistivity and spin polarization measurements.
- Source :
-
Journal of Physics D: Applied Physics . 4/1/2015, Vol. 48 Issue 12, p1-1. 1p. - Publication Year :
- 2015
-
Abstract
- A detailed study of the Fe2 − xCoxMnSi (0 ≤ x ≤ 0.6) alloys has been carried out by investigating the samples by x-ray diffraction, Mössbauer spectroscopy, magnetization, transport and current spin polarization measurements. A perfectly ordered L21 phase is found to exist for x = 0.4. Competing magnetic interactions between ferromagnetic and antiferromagnetic (AFM) phases are seen in the alloys with x < 0.2, whereas the AFM phase is completely absent for x ≥ 0.2 as revealed by the magnetization and resistivity data. The Curie temperature and saturation magnetization values increase with increase in the Co concentration. Anomalous, non metallic-like behaviour is observed for x = 0.4. Current spin polarization values of 0.61 ± 0.01 and 0.66 ± 0.01 were deduced for x = 0.2 and x = 0.4 respectively, using the point contact Andreev reflection spectroscopy . Considering the high spin polarization and Curie temperature, materials with x ≥ 0.2 appear to be very promising for spintronic devices. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00223727
- Volume :
- 48
- Issue :
- 12
- Database :
- Academic Search Index
- Journal :
- Journal of Physics D: Applied Physics
- Publication Type :
- Academic Journal
- Accession number :
- 101487240
- Full Text :
- https://doi.org/10.1088/0022-3727/48/12/125002