Effects of symmetry on circular and linear magnetic dichroism in angle-resolved photoemission spectra of Gd/Y (0001) and Fe-Ni//Cu (001)

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We have observed circular and linear magnetic dichroism in angle- resolved photoemission spectra of 50-monolayer Gd film grown on Y(0001) and 6-monolayer Fe-Ni alloy films grown on Cu(001). The 4f level of Gd and the Fe 3p level of the Fe-Ni alloy were measured. A different geometry was used for the magnetic circular dichroism than was used to measure the magnetic linear dichroism. The geometries were chosen so that the shape of the magnetic circular dichroism is predicted to be equal to the shape of the magnetic linear dichroism for four-fold symmetric Fe-Ni/Cu(001) but not for three-fold symmetric Gd/Y(0001). Experimental ... continued below

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7 p.

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Goodman, K.W.; Tobin, J.G.; Schumann, F.O.; Willis, R.F.; Gammon, J.W.; Pappas, D.P. et al. March 26, 1997.

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We have observed circular and linear magnetic dichroism in angle- resolved photoemission spectra of 50-monolayer Gd film grown on Y(0001) and 6-monolayer Fe-Ni alloy films grown on Cu(001). The 4f level of Gd and the Fe 3p level of the Fe-Ni alloy were measured. A different geometry was used for the magnetic circular dichroism than was used to measure the magnetic linear dichroism. The geometries were chosen so that the shape of the magnetic circular dichroism is predicted to be equal to the shape of the magnetic linear dichroism for four-fold symmetric Fe-Ni/Cu(001) but not for three-fold symmetric Gd/Y(0001). Experimental results are presented. In this paper we examine the effect of symmetry (experimental geometry and sample geometry) on magnetic linear and circular dichroism in angle- resolved photoemission. In particular we chose separate geometries for measuring magnetic circular and magnetic linear dichroism. The geometries were chosen such that samples with four-fold symmetry about the sample normal may have magnetic circular and magnetic linear dichroism of the same shape. But samples with three-fold symmetry should not exhibit circular and magnetic linear dichroism of the same shape. The samples studied are three-fold symmetric Gd films grown on Y(0001) and four-fold symmetric Fe-Ni alloy grown on Cu(001). After presenting the methods of the experiment, we briefly review parts of a model of magnetic dichroism developed by Venus and coworkers and our specialization and extension of it, particularly for FeNi/Cu(001). We then show the results of our measurements.

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7 p.

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OSTI as DE98051160

Other: FDE: PDF; PL:

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  • Spring meeting of the Materials Research Society, San Francisco, CA (United States), 31 Mar - 4 Apr 1997

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  • Other: DE98051160
  • Report No.: UCRL-JC--127023
  • Report No.: CONF-970302--
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 584993
  • Archival Resource Key: ark:/67531/metadc689808

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  • March 26, 1997

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  • Aug. 14, 2015, 8:43 a.m.

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  • April 6, 2017, 6:02 p.m.

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Goodman, K.W.; Tobin, J.G.; Schumann, F.O.; Willis, R.F.; Gammon, J.W.; Pappas, D.P. et al. Effects of symmetry on circular and linear magnetic dichroism in angle-resolved photoemission spectra of Gd/Y (0001) and Fe-Ni//Cu (001), article, March 26, 1997; California. (digital.library.unt.edu/ark:/67531/metadc689808/: accessed August 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.