Spin polarization in half-metals probed by femtosecond spin excitation

Müller GM, Walowski J, Djordjevic M, Miao G-X, Gupta A, Ramos AV, Gehrke K, Moshnyaga V, Samwer K, Schmalhorst J-M, Thomas A, et al. (2009)
NATURE MATERIALS 8(1): 56-61.

Zeitschriftenaufsatz | Veröffentlicht | Englisch
 
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DOI
Autor*in
Müller, Georg M.; Walowski, Jakob; Djordjevic, Marija; Miao, Gou-Xing; Gupta, Arunava; Ramos, Ana V.; Gehrke, Kai; Moshnyaga, Vasily; Samwer, Konrad; Schmalhorst, Jan-MichaelUniBi ; Thomas, AndyUniBi ; Hütten, AndreasUniBi
Alle
Einrichtung
Centrum für Biotechnologie > Arbeitsgruppe G. Reiss
Centrum für Biotechnologie > Institut für Biophysik und Nanowissenschaften
Centrum für Biotechnologie > Arbeitsgruppe A. Hütten
Fakultät für Physik > AG Dünne Schichten & Physik der Nanostrukturen
Abstract / Bemerkung
Knowledge of the spin polarization is of fundamental importance for the use of a material in spintronics applications. Here, we used femtosecond optical excitation of half-metals to distinguish between half-metallic and metallic properties. Because the direct energy transfer by Elliot-Yafet scattering is blocked in a half-metal, the demagnetization time is a measure for the degree of half-metallicity. We propose that this characteristic enables us vice versa to establish a novel and fast characterization tool for this highly important material class used in spin-electronic devices. The technique has been applied to a variety of materials where the spin polarization at the Fermi level ranges from 45 to 98%: Ni, Co2MnSi, Fe3O4, La0.66Sr0.33MnO3 and CrO2.
Erscheinungsjahr
2009
Zeitschriftentitel
NATURE MATERIALS
Band
8
Ausgabe
1
Seite(n)
56-61
ISSN
1476-1122
eISSN
1476-4660
Page URI
https://pub.uni-bielefeld.de/record/1636305

Zitieren

Müller GM, Walowski J, Djordjevic M, et al. Spin polarization in half-metals probed by femtosecond spin excitation. NATURE MATERIALS. 2009;8(1):56-61.
Müller, G. M., Walowski, J., Djordjevic, M., Miao, G. - X., Gupta, A., Ramos, A. V., Gehrke, K., et al. (2009). Spin polarization in half-metals probed by femtosecond spin excitation. NATURE MATERIALS, 8(1), 56-61. https://doi.org/10.1038/NMAT2341
Müller, Georg M., Walowski, Jakob, Djordjevic, Marija, Miao, Gou-Xing, Gupta, Arunava, Ramos, Ana V., Gehrke, Kai, et al. 2009. “Spin polarization in half-metals probed by femtosecond spin excitation”. NATURE MATERIALS 8 (1): 56-61.
Müller, G. M., Walowski, J., Djordjevic, M., Miao, G. - X., Gupta, A., Ramos, A. V., Gehrke, K., Moshnyaga, V., Samwer, K., Schmalhorst, J. - M., et al. (2009). Spin polarization in half-metals probed by femtosecond spin excitation. NATURE MATERIALS 8, 56-61.
Müller, G.M., et al., 2009. Spin polarization in half-metals probed by femtosecond spin excitation. NATURE MATERIALS, 8(1), p 56-61.
G.M. Müller, et al., “Spin polarization in half-metals probed by femtosecond spin excitation”, NATURE MATERIALS, vol. 8, 2009, pp. 56-61.
Müller, G.M., Walowski, J., Djordjevic, M., Miao, G.-X., Gupta, A., Ramos, A.V., Gehrke, K., Moshnyaga, V., Samwer, K., Schmalhorst, J.-M., Thomas, A., Hütten, A., Reiss, G., Moodera, J.S., Münzenberg, M.: Spin polarization in half-metals probed by femtosecond spin excitation. NATURE MATERIALS. 8, 56-61 (2009).
Müller, Georg M., Walowski, Jakob, Djordjevic, Marija, Miao, Gou-Xing, Gupta, Arunava, Ramos, Ana V., Gehrke, Kai, Moshnyaga, Vasily, Samwer, Konrad, Schmalhorst, Jan-Michael, Thomas, Andy, Hütten, Andreas, Reiss, Günter, Moodera, Jagadeesh S., and Münzenberg, Markus. “Spin polarization in half-metals probed by femtosecond spin excitation”. NATURE MATERIALS 8.1 (2009): 56-61.

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