Helical spin-density waves in Fe/Cr trilayers with perfect interfaces

Journal of Applied Physics

Volumn 85, Issue 8 II B, 1999, Pages 5877-5879

  Fishman, R S ^a  

^a OAK RIDGE NATIONAL LABORATORY   (United States)

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Indexed keywords

EID: 0005167166     PISSN: 00218979     EISSN: None     Source Type: Journal    
DOI: 10.1063/1.369900     Document Type: Article

References (19)

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2. A. Schreyer, J. F, Ankner, Th. Zeidler, H. Zabel, C. F. Majkrzak, M. Schäfer, and P. Grünberg, Europhys. Lett. 32, 595 (1995); A. Schreyer, C. F. Makrzak, Th. Zeidler, T. Schmitte, P. Bodeker, K. Theis-Bröhl, A. Abromeit, J. A. Dura, and T. Watanabe, Phys. Rev. Lett. 79, 4914 (1997).
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12. Strictly speaking, the NIST measurements only show that the distance between ISDW nodes grows quite rapidly with increasing temperature. A simple extrapolation of the NIST data would indicate that the I SDW period diverges at about 600 K.
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14. The I SDW sketched in Fig. 1 is transverse with moments perpendicular to the ordering wave vector. A longitudinal I SDW with moments in the z direction is also possible and appears in pure Cr below 120 K.
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18. In bulk Cr, the phase θ of the C SDW is constrained so that the rms moments of the I and C SDWs are the same for the same order parameter g. But the energy of the trilayer is minimized with respect to the phase θ so that the amplitudes of the C, H, and I SDWs are now identical. This requires a charge modulation of the trilayer with some electrons transferred from the Fe layers to the Cr spacer within a coherence length from the Fe-Cr interface.
19. R. S. Fishman, Phys. Rev. Lett. 81, 4979 (1998); (unpublished).