Out-of-plane nesting driven spin spiral in ultrathin Fe/Cu(001) films

J. Miyawaki, A. Chainani, Y. Takata, M. Mulazzi, M. Oura, Y. Senba, H. Ohashi, S. Shin

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

Epitaxial ultrathin Fe films on fcc Cu(001) exhibit a spin spiral (SS), in contrast to the ferromagnetism of bulk bcc Fe. We study the in-plane (IP) and out-of-plane (OP) Fermi surfaces (FSs) of the SS in 8 monolayer Fe/Cu(001) films using energy-dependent soft-x-ray momentum-resolved photoemission spectroscopy. We show that the SS originates in nested regions confined to OP FSs, which are drastically modified compared to IP FSs. From precise reciprocal-space maps in successive zones, we obtain the associated real space compressive strain of 1.5±0.5% along c axis. An autocorrelation analysis quantifies the incommensurate ordering vector q=(2π/a)(0,0,∼0.86), favoring a SS and consistent with magneto-optic Kerr effect experiments. The results reveal the importance of IP and OP FS mapping for ultrathin films.

Original languageEnglish
Article number066407
JournalPhysical review letters
Volume104
Issue number6
DOIs
Publication statusPublished - 2010 Feb 12

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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