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| Home > Publications database > Impact of the interface quality of Pt/YIG(111) hybrids on their spin Hall magnetoresistance |
| Journal Article | FZJ-2017-00250 |
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2017
American Inst. of Physics
Melville, NY
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Please use a persistent id in citations: http://hdl.handle.net/2128/16971 doi:10.1063/1.4973460
Abstract: We study the influence of the interface quality of Pt/Y3Fe5O12(111) hybrids on their spin Hall magnetoresistance. This is achieved by exposing Y3Fe5O12(111) single crystal substrates to different well-defined surface treatments prior to the Pt deposition. The quality of the Y3Fe5O12(YIG) surface, the Pt/YIG interface and the Pt layer is monitored in-situ by reflection high-energy electron diffrac- tion and Auger electron spectroscopy as well as ex-situ by atomic force microscopy and X-ray diffraction. To identify the impact of the different surface treatments on the spin Hall magnetoresis- tance, angle-dependent magnetoresistance measurements are carried out at room temperature. The largest spin Hall magnetoresistance is found in Pt/YIG fabricated by a two-step surface treatment consisting of a “piranha” etch process followed by an annealing step at 500C in pure oxygen atmo- sphere. Our data suggest that the small spin Hall magnetoresistance in Pt/YIG without any surface treatments of the YIG substrate prior to Pt deposition is caused by a considerable carbon agglomera- tion at the Y3Fe5O12 surface.
Keyword(s): Information and Communication (1st) ; Magnetism (2nd)
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