Phonon density of states in Fe/Cr (001) superlattices and Tb-Fe thin-film alloys.

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Inelastic nuclear scattering of X-rays from the 14.413 keV nuclear resonance of {sup 57}Fe was employed to measure directly the Fe-projected phonon density of states (DOS) in MBE-grown Fe/Cr(00l) superlattices on MgO(001). The Moessbauer-inactive {sup 56}Fe isotope was used in the Fe layers. A 1{angstrom} thick Moessbauer-active {sup 57}Fe-probe layer (95% enriched) was placed at different locations within the Fe layers. This procedure permits one to distinguish phonon density of states at the Fe-Cr-interface from that at the center of the Fe-film. Distinct differences have been observed in the DOS of our samples. The phonon DOS of an amorphous Tb{sub ... continued below

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12 p.

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Alp, E. E.; Keune, W.; Roehlsberger, R.; Ruckert, T.; Schror, H. & Sturhahn, W. February 15, 1999.

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Inelastic nuclear scattering of X-rays from the 14.413 keV nuclear resonance of {sup 57}Fe was employed to measure directly the Fe-projected phonon density of states (DOS) in MBE-grown Fe/Cr(00l) superlattices on MgO(001). The Moessbauer-inactive {sup 56}Fe isotope was used in the Fe layers. A 1{angstrom} thick Moessbauer-active {sup 57}Fe-probe layer (95% enriched) was placed at different locations within the Fe layers. This procedure permits one to distinguish phonon density of states at the Fe-Cr-interface from that at the center of the Fe-film. Distinct differences have been observed in the DOS of our samples. The phonon DOS of an amorphous Tb{sub 33}Fe{sub 67} alloy film was found to be a broad and structureless hump, contrary to that of an epitaxial TbFe{sub 2} film, which exhibits characteristic features.

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12 p.

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INIS; OSTI as DE00012391

Medium: P; Size: 12 pages

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  • International Conference on Magnetic Multilayers, Vancouver, British Columbia (CA), 06/15/1998--06/19/1998

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  • Report No.: ANL/XFD/CP-98412
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 12391
  • Archival Resource Key: ark:/67531/metadc625667

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  • February 15, 1999

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  • June 16, 2015, 7:43 a.m.

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  • April 6, 2017, 8:07 p.m.

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Alp, E. E.; Keune, W.; Roehlsberger, R.; Ruckert, T.; Schror, H. & Sturhahn, W. Phonon density of states in Fe/Cr (001) superlattices and Tb-Fe thin-film alloys., article, February 15, 1999; Illinois. (digital.library.unt.edu/ark:/67531/metadc625667/: accessed September 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.