Temperature dependence of the spin Hall angle and switching current in the nc-W(O)/CoFeB/MgO system with perpendicular magnetic anisotropy

Neumann L, Meier D, Schmalhorst J-M, Rott K, Reiss G, Meinert M (2016)
APPLIED PHYSICS LETTERS 109(14): 142405.

Zeitschriftenaufsatz | Veröffentlicht | Englisch
 
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DOI
Autor*in
Neumann, L.; Meier, DanielUniBi ; Schmalhorst, Jan-MichaelUniBi ; Rott, KarstenUniBi; Reiss, GünterUniBi ; Meinert, MarkusUniBi
Einrichtung
Fakultät für Physik > AG Dünne Schichten & Physik der Nanostrukturen
Abstract / Bemerkung
We investigated the temperature dependence of the switching current for a perpendicularly magnetized CoFeB film deposited on a nanocrystalline tungsten film with large oxygen content: nc-W(O). The effective spin Hall angle vertical bar Theta(eff)(SH)vertical bar approximate to 0.22 is independent of temperature, whereas the switching current increases strongly at low temperature. The increase indicates that the current induced switching itself is thermally activated, in agreement with a recent theoretical prediction. The dependence of the switching current on the in-plane assist field suggests the presence of an interfacial Dzyaloshinskii-Moriya interaction with D approximate to 0.23 mJ/m(2), intermediate between the Pt/CoFe and Ta/CoFe systems. We show that the nc-W(O) is insensitive to annealing, which makes this system a good choice for the integration into magnetic memory or logic devices that require a high-temperature annealing process during fabrication. Published by AIP Publishing.
Erscheinungsjahr
2016
Zeitschriftentitel
APPLIED PHYSICS LETTERS
Band
109
Ausgabe
14
Art.-Nr.
142405
ISSN
0003-6951
eISSN
1077-3118
Page URI
https://pub.uni-bielefeld.de/record/2907744

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Neumann L, Meier D, Schmalhorst J-M, Rott K, Reiss G, Meinert M. Temperature dependence of the spin Hall angle and switching current in the nc-W(O)/CoFeB/MgO system with perpendicular magnetic anisotropy. APPLIED PHYSICS LETTERS. 2016;109(14): 142405.
Neumann, L., Meier, D., Schmalhorst, J. - M., Rott, K., Reiss, G., & Meinert, M. (2016). Temperature dependence of the spin Hall angle and switching current in the nc-W(O)/CoFeB/MgO system with perpendicular magnetic anisotropy. APPLIED PHYSICS LETTERS, 109(14), 142405. doi:10.1063/1.4964415
Neumann, L., Meier, Daniel, Schmalhorst, Jan-Michael, Rott, Karsten, Reiss, Günter, and Meinert, Markus. 2016. “Temperature dependence of the spin Hall angle and switching current in the nc-W(O)/CoFeB/MgO system with perpendicular magnetic anisotropy”. APPLIED PHYSICS LETTERS 109 (14): 142405.
Neumann, L., Meier, D., Schmalhorst, J. - M., Rott, K., Reiss, G., and Meinert, M. (2016). Temperature dependence of the spin Hall angle and switching current in the nc-W(O)/CoFeB/MgO system with perpendicular magnetic anisotropy. APPLIED PHYSICS LETTERS 109:142405.
Neumann, L., et al., 2016. Temperature dependence of the spin Hall angle and switching current in the nc-W(O)/CoFeB/MgO system with perpendicular magnetic anisotropy. APPLIED PHYSICS LETTERS, 109(14): 142405.
L. Neumann, et al., “Temperature dependence of the spin Hall angle and switching current in the nc-W(O)/CoFeB/MgO system with perpendicular magnetic anisotropy”, APPLIED PHYSICS LETTERS, vol. 109, 2016, : 142405.
Neumann, L., Meier, D., Schmalhorst, J.-M., Rott, K., Reiss, G., Meinert, M.: Temperature dependence of the spin Hall angle and switching current in the nc-W(O)/CoFeB/MgO system with perpendicular magnetic anisotropy. APPLIED PHYSICS LETTERS. 109, : 142405 (2016).
Neumann, L., Meier, Daniel, Schmalhorst, Jan-Michael, Rott, Karsten, Reiss, Günter, and Meinert, Markus. “Temperature dependence of the spin Hall angle and switching current in the nc-W(O)/CoFeB/MgO system with perpendicular magnetic anisotropy”. APPLIED PHYSICS LETTERS 109.14 (2016): 142405.
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