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Spin-resolved photoemission of in-situ sputtered iron and iron-yttrium alloys

Xu, Y.B., Greig, D., Seddon, E.A. and Matthew, J.A.D. (1997) Spin-resolved photoemission of in-situ sputtered iron and iron-yttrium alloys. Physical Review B: Condensed Matter and Materials Physics, 55 (17). pp. 11442-11447. ISSN 1550-235X

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Abstract

Spin-resolved photoemission spectra of amorphous Fe-Y alloys have been obtained and compared with both those of pure Fe and with theoretical electronic structure calculations. The thin iron and alloy films were prepared by in situ sputtering, and the spectra were obtained using 110-eV photons from the UK Synchrotron Facility. From secondary electron spin hysteresis loops, Fe60Y40 starts to order ferromagnetically well before the lowest temperature accessible with our equipment (114 K), but Fe41Y59 shows no polarization down to this temperature. Although the spin-integrated photoemission spectrum of the valence band of Fe60Y40 shows little difference from that of pure Fe, the spin-resolved spectra are significantly different. Fe60Y40 also exhibits a reduced valence band polarization (14%) compared with iron, and contrary to predictions, the majority spin states of Fe60Y40 dominate at the Fermi edge. No evidence is found for strong ferromagnetism. Unexpectedly, the 1-eV secondary electron polarization of Fe60Y40 (7%) is found to be low compared with the valence band polarization, an effect that may be due to a negative moment on the yttrium. © 1997 The American Physical Society

Item Type: Article
Copyright, Publisher and Additional Information: © 1997 The American Physical Society. Available from the author's web site (Associated URL field).
Keywords:
Academic Units: The University of Leeds > Faculty of Maths and Physical Sciences (Leeds) > School of Physics and Astronomy (Leeds)
The University of York > Electronics (York)
The University of York > Physics (York)
Depositing User: Repository Officer
Date Deposited: 08 Jan 2007
Last Modified: 29 Sep 2010 14:26
Published Version: http://link.aps.org/abstract/PRB/v55/p11442
Status: Published
Publisher: American Physical Society
Refereed: Yes
Identification Number: 10.1103/PhysRevB.55.11442
Related URLs:
URI: http://eprints.whiterose.ac.uk/id/eprint/1878

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