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The electronic structure of GdN from x-ray spectroscopy

The electronic structure of GdN from x-ray spectroscopy. Andrew Preston andrew@preston.co.nz Department of Physics Boston University. NML at BU. Co-authors. Ben Ruck , Joe Trodahl Victoria University of Wellington, New Zealand Walter Lambrecht Case Western Reserve James Downes

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The electronic structure of GdN from x-ray spectroscopy

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  1. The electronic structure of GdN from x-ray spectroscopy Andrew Preston andrew@preston.co.nz Department of Physics Boston University

  2. NML at BU

  3. Co-authors • Ben Ruck, Joe Trodahl • Victoria University of Wellington, New Zealand • Walter Lambrecht • Case Western Reserve • James Downes • Macquari University, Australia • Louis Piper, Kevin Smith • Boston University

  4. Overview • High quality thin films • Temperature dependant • X-ray at the N K- and GdM-edges • Absorption • Emission • Resonant emission

  5. GdN • Half-filled 4f shell • Phys. Rev. B 73, 235335 (2006) • Semiconducting • Ferromagnetic 70 K • Phys. Rev. B 76, 085211 (2007) • Optical redshift • J. Appl. Phys. 106, 063910 (2009) • Epitaxial GdN • n ~ 4 x 1020 cm-3 • Negative magnetoresistance • YSZ capping layer

  6. X-ray absorption (XAS) Empty Ef Filled

  7. X-ray absorption (XAS) Empty Ef Filled

  8. X-ray emission (XES) Empty Ef Filled

  9. Band structure

  10. Band structure

  11. N K-edge XXS

  12. ReN N K-edge XAS

  13. N K-edge XXS

  14. Spin-resolved PDOS

  15. M-edge XAS and XES

  16. Thanks • Appl. Phys. Lett. submitted

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