Hostname: page-component-78c5997874-94fs2 Total loading time: 0 Render date: 2024-11-10T11:43:02.290Z Has data issue: false hasContentIssue false
  • English
  • Français

Strong Non-Linear MCD-Effects Due to Partially Circular Polarized Light Sources

Published online by Cambridge University Press:  15 February 2011

Hartmut Höchst ,
Dai Zhao  and
David L. Huber
Hartmut Höchst
Affiliation:
Synchrotron Radiation Center, University of Wisconsin-Madison3731 Schneider Drive, Stoughton, WI53589–3097
Dai Zhao
Affiliation:
Synchrotron Radiation Center, University of Wisconsin-Madison3731 Schneider Drive, Stoughton, WI53589–3097
David L. Huber
Affiliation:
Synchrotron Radiation Center, University of Wisconsin-Madison3731 Schneider Drive, Stoughton, WI53589–3097
Get access

Abstract

Most soft x-ray magnetic dichroism studies are carried out with light of mixed polarization. The effect of incomplete circular polarization is usually taken care off by linearly extrapolating the data to Pcirc=l. Using a classical model which includes the polarization factor we show that the MCD-effect, which is the normalized quantity 2(I+-I-)/(I++I-), is highly non-linear with regard to cire. With a specially designed quadruple reflection phase shifter we measured the MCD effect with Pcire<l as well as with Pcirc∼1. MCD spectra of Fe around the M2,3 transition verify our model calculations of the polarization dependence. The data indicate that the observed non-linear response of the MCD-effect to Pcirc can generally introduce large errors in the quantitative analysis of MCD data where spin <Sz> and orbital <LZ> moments are extracted by means of sum rules.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 475: Symposium M – Magnetic Ultrathin Films, Multilayers, and Surfaces – 1997 , 1997 , 315
Copyright
Copyright © Materials Research Society 1997

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. Smith, N.V., Chen, C.T., Sette, F., and Mattheiss, L. F., Phys. Rev. B46, 1023 (1992)Google Scholar
2. Wu, Y., Stöhr, J., Hermesmeier, B.D., Samant, M.G. and Weller, D., Phys. Rev. Lett. 69, 2307 (1992).Google Scholar
3. Tobin, J., Waddill, G.D. and Pappas, D.P., Phys. Rev Lett. 68, 3642 (1992) and.Google Scholar
Tobin, J.G., Waddill, G.D., Jankowski, A.F., Sterne, P.A., and Pappas, D.P., Phys. Rev B 52, 6530 (1995).Google Scholar
4. Thole, B.T., Carra, P., Sette, F. and van der Laan, G., Phys. Rev. Lett 68, 1943 (1992)Google Scholar
5. Carra, P., Thole, B.T., Altarelli, M. and Wang, X., Phys. Rev. Lett 70, 694 (1993)Google Scholar
6. Höchst, H., Zhao, D. and Huber, D.L., Surf. Science 252–254, 998 (1996).Google Scholar
7. Zhao, D., PhD Thesis, Department of Physiscs, University of Wisconsin-Madison (1996)Google Scholar
8. Höchst, H., Bulicke, P., Nelson, T., and Middleton, F., Rev. Sei. Instrum. 66, 1598 (1995)Google Scholar
9. Höchst, H., Patel, R., and Middleton, F., Nuclear Instrum. Methods A347, 107 (1994)Google Scholar
10. Höchst, H., Rioux, D., Zhao, D. and Huber, D.L., J of Applied Phys (in press)Google Scholar