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Bulk spin polarization of Co(1-x)FexS2
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Utfeld, C., Giblin, S. R., Taylor, J. W., Duffy, J. A., Shenton-Taylor, C., Laverock, J., Dugdale, S. B., Manno, M., Leighton, C., Itou, M. and Sakurai, Y. (2009) Bulk spin polarization of Co(1-x)FexS2. Physical Review Letters, Vol.103 (No.22). Article no. 226403. doi:10.1103/PhysRevLett.103.226403 ISSN 0031-9007.
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Official URL: http://dx.doi.org/10.1103/PhysRevLett.103.226403
Abstract
We report on a new method to determine the degree of bulk spin polarization in single crystal Co(1-x)FexS2 by modeling magnetic Compton scattering with ab initio calculations. Spin-dependent Compton profiles were measured for CoS2 and Co0.9Fe0.1S2. The ab initio calculations were then refined by rigidly shifting the bands to provide the best fit between the calculated and experimental directional profiles for each sample. The bulk spin polarizations, P, corresponding to the spin-polarized density of states at the Fermi level, were then extracted from the refined calculations. The values were found to be P=-72 +/- 6% and P=18 +/- 7% for CoS2 and Co0.9Fe0.1S2, respectively. Furthermore, determinations of P weighted by the Fermi velocity (v(F) or v(F)(2)) were obtained, permitting a rigorous comparison with other experimental data and highlighting the experimental dependence of P on v(F).
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Subjects: | Q Science > QC Physics | ||||
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
| Journal or Publication Title: | Physical Review Letters | ||||
| Publisher: | American Physical Society | ||||
| ISSN: | 0031-9007 | ||||
| Official Date: | 27 November 2009 | ||||
| Dates: |
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| Volume: | Vol.103 | ||||
| Number: | No.22 | ||||
| Number of Pages: | 4 | ||||
| Page Range: | Article no. 226403 | ||||
| DOI: | 10.1103/PhysRevLett.103.226403 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access | ||||
| Funder: | NSF MRSEC | ||||
| Grant number: | DMR-0212302, DMR-0819885 |
Data sourced from Thomson Reuters' Web of Knowledge
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