Volume 101, Number 1, January 2013
|Number of page(s)||6|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||11 January 2013|
Large wave vector surface spin waves of the nanomartensitic phase in ultrathin iron films on Cu(100)
1 Peter Grünberg Institut (PGI-6), Forschungszentrum Jülich - 52425 Jülich, Germany, EU
2 Peter Grünberg Institut (PGI-3), Forschungszentrum Jülich - 52425 Jülich, Germany, EU
3 Jülich-Aachen Research Alliance (JARA) - 52425 Jülich, Germany, EU
Received: 26 November 2012
Accepted: 20 December 2012
It is generally accepted that thin-film magnetism is strongly affected by even small structural modifications. Much less is known about the influence of structure on magnetic excitations, in particular, spin waves. Using electron energy loss spectroscopy we have studied the dispersion of large wave vector surface spin waves of a system for which details of the structure became known only recently, namely ultrathin iron films grown on Cu(100) surfaces. We find the spin wave dispersion to be nearly identical to the dispersion reported for bcc Fe(110) layers grown on W(110). We therefore conclude that the observed spin wave signal stems from the “nanomartensitic” phase of Fe/Cu(100) and that this phase is not merely a surface phase but encompasses the deeper layers.
PACS: 75.70.Tj – Spin-orbit effects / 75.30.Ds – Spin waves
© EPLA, 2013
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