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Surface magnetization reversal of sputtered CrO2

  • E. Goering EMAIL logo , S. Gold and J. Will
Published/Copyright: January 31, 2022
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 93 Issue 5

Abstract

We have investigated the magnetic behavior of semi-metallic CrO2 powder samples as a function of Ar sputtering at low kinetic energy. By the use of X-ray absorption spectroscopy at the O K edge and X-ray magnetic circular dichroism at the Cr L2,3 edges as a function of sputtering time, a strong decrease of the absolute magnetic moment has been observed corresponding to a surface reduction to a Cr2O3- like compound, deduced by chemical shifts in the X-ray absorption spectra. An unexpected change of sign of the Cr L2,3 dichroism signal was found and interpreted by the formation of an antiparallel coupled ferromagnetic top layer. By comparison with epitaxial grown CrO2 films a quantitative estimation of the initial Cr2O3 toplayer thickness is possible.

Abstract

Es wurde das magnetische Verhalten von CrO2-Pulverproben unter Einfluss des Oberflächensputterns mit Ar-Ionen bei niedriger kinetischer Energie untersucht. Durch Röntgen-Absorptionsspektroskopie an der O-K-Kante und mittels magnetischem Röntgen-Zirkular-Dichroismus (XMCD) an den Cr-L2,3-Kanten als Funktion der Sputterzeit konnte ein starke Abnahme des absoluten magnetischen Momentes beobachtet werden, was auf eine Reduktion der Oberfläche zu einer Cr2O3 ähnlichen Verbindung zurückgeführt werden konnte. Diese Reduktion wurde in einer chemischen Verschiebung des Röntgen-Absorptionsspektrums nachgewiesen. Das Cr-L2,3-Spektrum zeigte nach dem Sputtern einen unerwarteten Vorzeichenwechsel, der durch eine zum inneren CrO2 antiparallel orientierte und ferromagnetisch geordnete Oberflächenschicht interpretiert werden konnte. Durch den Vergleich mit epitaktisch gewachsenen Filmen konnte die ursprüngliche Cr2O3-Dicke der Deckschicht der ungesputterteten Probe abgeschätzt werden.

Keywords: Semi-metal; Sputtering effects; Chemical shifts; Absorption spectroscopy; Orbital moment; Spin moment; Magnetic dipole term; Surface magnetism; Antiparallel coupling; X-ray magnetic circular dichroism
Dr. Eberhard Goering Max-Planck-Institut für Metallforschung Heisenbergstr. 1, D-70569 Stuttgart, Germany Tel.: +49 711 689 1815 Fax: +49 711 689 1912

  1. We would like to thank H. Gundlach for kind user support at BESSY, F. Weigand and J. Geissler for helpful discussions, and A. Fuss for support at the beam time. This work was performed at and supported by BESSY GmbH. Additional financial support by DFG (Schu 964/2-3).

References

1 Korotin, M.A.; Anisimov, V.I.; Khomskii, D.I.; Sawatzky, G.A.: Phys. Rev. Lett. 80 (1998) 4305.10.1103/PhysRevLett.80.4305Search in Google Scholar

2 Lewis, S.P.; Allen, P.B.; Sasaki, T.: Phys. Rev. B 55 (1997) 10253.10.1103/PhysRevB.55.10253Search in Google Scholar

3 Mazin, I.I.; Singh, D.J.; Ambrosch-Draxl, C.: Phys. Rev. B 59 (1999) 411.10.1103/PhysRevB.59.411Search in Google Scholar

4 Schwarz, K.: J. Phys. F: Met. Phys. 16 (1986) L211.10.1088/0305-4608/16/9/002Search in Google Scholar

5 Soulen, R.J.; Byers, J.M.; Osofsky, M.S.; Nadgorny, B.; Ambrose, T.; Cheng, S.F.; Broussard, P.R.; Tanaka, C.T.; Nowak, J.; Moodera, J.S.; Barry, A.; Coey, J.M.D.: Science 282 (1999) 85.10.1126/science.282.5386.85Search in Google Scholar

6 Dedkov, Yu.S.; Fonine, M.; Konig, C.; Rüdiger, U.; Güntherodt, G.: Appl. Phys. Lett. (2002), accepted.Search in Google Scholar

7 Attenkofer, K.; Schuetz, G.: J. Phys. IV 7 (1997) C2–459.10.1051/jp4/1997052Search in Google Scholar

8 Rabe, M.; Pommer, J.; Samm, K.; Özyilmas, B.; König, C.; Fraune, M.; Rüdiger, U.; Güntherodt, G.; Senz, S.; Hesse, D.: J. Phys.: Condens. Matter 14 (2002) 7.Search in Google Scholar

9 Schedel-Niedrig, T.: Fresenius J. Anal. Chem. 361 (1998) 680.10.1007/s002160050990Search in Google Scholar

10 Porta, P.; Marezio, M.; Reimeika, J.P.; Dernier, P.D.: Mater. Res. Bull. 7 (1972) 157.10.1016/0025-5408(72)90272-3Search in Google Scholar

11 Swoboda, T.J.; Arthur, P.; Cox Jr, N.L.; Ingraham, J.N.; Oppegard, A.L.; Sadler, M.S.: J. Appl. Phys. 32 (1961) 374.10.1063/1.2000477Search in Google Scholar

12 Thamer, B.J.; Douglass, R.M.; Staritzky, E.: J.Am. Chem. Soc. 79 (1957) 547.10.1021/ja01560a013Search in Google Scholar

13 BASF: Technical DATA Sheet, CrO2 CT 26-01.Search in Google Scholar

14 Halada, G.P.; Clayton, C.R.; Lindsley, D.H.: Mater. Sci. Eng. A 103 (1988) L5.10.1016/0025-5416(88)90522-8Search in Google Scholar

15 Goering, E.; Müller, O.; den Boer, M.L.; Horn, S.: Physica B 194–196 (1994) 1217.10.1016/0921-4526(94)90938-5Search in Google Scholar

16 Stagarescu, C.B.; Su, X.; Eastman, D.E.; Altmann, K.N.; Himpsel, F.J.; Gupta, A.: Phys. Rev. B 61 (2000) R9233.10.1103/PhysRevB.61.R9233Search in Google Scholar

17 Goering, E.; Bayer, A.; Gold, S.; Schuetz, G.; Rabe, M.; Rüdiger, U.; Güntherodt, G.: Europhys. Lett. (2002), accepted.Search in Google Scholar

18 de Groot, F.M.F.; Griony, M.; Fuggle, J.C.; Ghijsen, J.; Sawatzky, G.A.; Petersen, H.: Phys. Rev. B 40 (1989) 5715.10.1103/PhysRevB.40.5715Search in Google Scholar

19 Goering, E.; Justen, M.; Geissler, J.; Rüdiger, U.; Rabe, M.; Güntherodt, G.; Schuetz, G.: Appl. Phys. A (2002), accepted.Search in Google Scholar

20 Goering, E.; Bayer, A.; Gold, S.; Schuetz, G.; Rabe, M.; Rüdiger, U.; Güntherodt, G.: Phys. Rev. Lett. (2001), accepted.Search in Google Scholar

21 Schuetz, G.; Wagner, W.; Wilhelm, W.; Kienle, P.; Zeller, R.; Frahm, R.; Materlik, G.: Phys. Rev. Lett. 58 (1987) 737.10.1103/PhysRevLett.58.737Search in Google Scholar PubMed

22 Carra, P.; Thole, B.T.; Altarelli, M.;Wang, X.: Phys. Rev. Lett. 70 (1993) 694.10.1103/PhysRevLett.70.694Search in Google Scholar PubMed

23 Thole, B.T.; Carra, P.; Sette, F.; Van Der Laan, G.: Phys. Rev. Lett. 68 (1992) 1943.10.1103/PhysRevLett.68.1943Search in Google Scholar PubMed

24 Goering, E.; Ahlers, D.; Attenkofer, K.; Obermeier, G.; Horn, S.; Schuetz, G.: J. Sync. Rad. 6 (1999) 537.10.1107/S0909049598017543Search in Google Scholar PubMed

25 Goering, E.; Gold, S.; Schuetz, G.: J. Sync. Rad. 8 (2001) 422.10.1107/S0909049500018355Search in Google Scholar PubMed

26 Chen, C.T.; Idzerda, Y.U.; Lin, H.J.; Smith, N.V.; Meigs, G.; Chaban, E.; Ho, G.H.; Pellegrin, E.; Sette, F.: Phys. Rev. Lett. 75 (1995) 152.10.1103/PhysRevLett.75.152Search in Google Scholar PubMed

27 Stöhr, J.; König, H.: Phys. Rev. Lett. 75 (1995) 3748.10.1103/PhysRevLett.75.3748Search in Google Scholar

28 Stöhr, J.: J. Magn. Magn. Mat. 200 (1999) 470.10.1016/S0304-8853(99)00407-2Search in Google Scholar

29 Chen, C.T.; Idzerda, Y.U.; Lin, H.J.; Meigs, G.; Chaiken, A.; Prinz, G.A.; Ho, G.H.: Phys. Rev. B 48 (1993) 642.10.1103/PhysRevB.48.642Search in Google Scholar PubMed

30 Goering, E.; Fuss, A.; Weber, W.; Will, J.; Schuetz, G.: J. Appl. Phys. 88 (2000) 5920.10.1063/1.1308095Search in Google Scholar

31 Idzerda, Y.U.; Tjeng, L.H.; Lin, H.J.; Gutierrez, C.J.; Meigs, G.; Chen, C.T.: Phys. Rev. B 48 (1993) 4144.10.1103/PhysRevB.48.4144Search in Google Scholar

32 Nakajima, R.; Stöhr, J.; Idzerda, Y.U.: Phys. Rev. B 59 (1999) 6421.10.1103/PhysRevB.59.6421Search in Google Scholar

33 Hunter Dunn, J.; Arvanitis, D.; Martensson, N.; Tischer, M.; May, F.; Russo, M.; Baberschke, K.: J. Phys. Condens. Matter 7 (1995) 1111.10.1088/0953-8984/7/6/012Search in Google Scholar
Received: 2002-02-18
Published Online: 2022-01-31

© 2002 Carl Hanser Verlag, München

Articles in the same Issue

  1. Frontmatter
  2. Editorial
  3. Editorial
  4. Max-Planck-Institut für Metallforschung
  5. Articles/Aufsätze
  6. Towards a micromechanical understanding of biological surface devices
  7. Solid state phase transformation kinetics: a modular transformation model
  8. Electronic structure investigations of Ni and Cr films on (100)SrTiO3 substrates using electron energy-loss spectroscopy
  9. Surface magnetization reversal of sputtered CrO2
  10. Magnetic imaging with full-field soft X-ray microscopy
  11. Dislocation dynamics in sub-micron confinement: recent progress in Cu thin film plasticity
  12. Fatigue behavior of polycrystalline thin copper films
  13. Grain growth in magnetron-sputtered nickel films
  14. Thin Pd films on SrTiO3 (001) substrates: ab initio local-density-functional theory
  15. Coupled grain boundary and surface diffusion in a polycrystalline thin film constrained by substrate
  16. Gallium segregation at grain boundaries in aluminium
  17. Current work at the Stuttgart UHV diffusion bonding facility
  18. Bonding between Cu and α-Al2O3
  19. Compressive deformation of niobium sandwich-bonded to alumina
  20. SiO2-coated carbon nanotubes: theory and experiment
  21. Simulation of solidification structures of binary alloys
  22. Gaseous nitriding of iron-chromium alloys
  23. Deposition of ceramic materials from aqueous solution induced by organic templates
  24. Notifications/Mitteilungen
  25. Personen
  26. Books
  27. Information
  28. DGM Further Training
https://doi.org/10.3139/ijmr-2002-0065
Keywords for this article
Semi-metal; Sputtering effects; Chemical shifts; Absorption spectroscopy; Orbital moment; Spin moment; Magnetic dipole term; Surface magnetism; Antiparallel coupling; X-ray magnetic circular dichroism

Articles in the same Issue

  1. Frontmatter
  2. Editorial
  3. Editorial
  4. Max-Planck-Institut für Metallforschung
  5. Articles/Aufsätze
  6. Towards a micromechanical understanding of biological surface devices
  7. Solid state phase transformation kinetics: a modular transformation model
  8. Electronic structure investigations of Ni and Cr films on (100)SrTiO3 substrates using electron energy-loss spectroscopy
  9. Surface magnetization reversal of sputtered CrO2
  10. Magnetic imaging with full-field soft X-ray microscopy
  11. Dislocation dynamics in sub-micron confinement: recent progress in Cu thin film plasticity
  12. Fatigue behavior of polycrystalline thin copper films
  13. Grain growth in magnetron-sputtered nickel films
  14. Thin Pd films on SrTiO3 (001) substrates: ab initio local-density-functional theory
  15. Coupled grain boundary and surface diffusion in a polycrystalline thin film constrained by substrate
  16. Gallium segregation at grain boundaries in aluminium
  17. Current work at the Stuttgart UHV diffusion bonding facility
  18. Bonding between Cu and α-Al2O3
  19. Compressive deformation of niobium sandwich-bonded to alumina
  20. SiO2-coated carbon nanotubes: theory and experiment
  21. Simulation of solidification structures of binary alloys
  22. Gaseous nitriding of iron-chromium alloys
  23. Deposition of ceramic materials from aqueous solution induced by organic templates
  24. Notifications/Mitteilungen
  25. Personen
  26. Books
  27. Information
  28. DGM Further Training
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