Tyck till om SwePub Sök här!
WFRF:(Palsson G. K.)
Sökning: WFRF:(Palsson G. K.) > (2015-2019) > Hard x-ray standing...
Hard x-ray standing-wave photoemission insights into the structure of an epitaxial Fe/MgO multilayer magnetic tunnel junction
-
- Conlon, C. S. (författare)
- Univ Calif Davis, Dept Phys, Davis, CA 95616 USA;Lawrence Berkeley Natl Lab, Mat Sci Div, Berkeley, CA 94720 USA
-
- Conti, G. (författare)
- Univ Calif Davis, Dept Phys, Davis, CA 95616 USA;Lawrence Berkeley Natl Lab, Mat Sci Div, Berkeley, CA 94720 USA
-
- Nemsak, S. (författare)
- Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA
- visa fler...
- visa färre...
- (creator_code:org_t)
- AIP Publishing, 2019
- 2019
- Engelska.
- Ingår i: Journal of Applied Physics. - : AIP Publishing. - 0021-8979 .- 1089-7550. ; 126:7
- Tidskriftsartikel (refereegranskat)
Abstract
Ämnesord
Stäng
- The Fe/MgO magnetic tunnel junction is a classic spintronic system, with current importance technologically and interest for future innovation. The key magnetic properties are linked directly to the structure of hard-to-access buried interfaces, and the Fe and MgO components near the surface are unstable when exposed to air, making a deeper probing, nondestructive, in-situ measurement ideal for this system. We have thus applied hard x-ray photoemission spectroscopy (HXPS) and standing-wave (SW) HXPS in the few kilo-electron-volt energy range to probe the structure of an epitaxially grown MgO/Fe superlattice. The superlattice consists of 9 repeats of MgO grown on Fe by magnetron sputtering on an MgO(001) substrate, with a protective Al2O3 capping layer. We determine through SW-HXPS that 8 of the 9 repeats are similar and ordered, with a period of 33 +/- 4 angstrom, with the minor presence of FeO at the interfaces and a significantly distorted top bilayer with ca. 3 times the oxidation of the lower layers at the top MgO/Fe interface. There is evidence of asymmetrical oxidation on the top and bottom of the Fe layers. We find agreement with dark-field scanning transmission electron microscope (STEM) and x-ray reflectivity measurements. Through the STEM measurements, we confirm an overall epitaxial stack with dislocations and warping at the interfaces of ca. 5 angstrom. We also note a distinct difference in the top bilayer, especially MgO, with possible Fe inclusions. We thus demonstrate that SW-HXPS can be used to probe deep buried interfaces of novel magnetic devices with few-angstrom precision.
Ämnesord
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
Hitta via bibliotek
- Journal of Applied Physics (Sök värdpublikationen i LIBRIS)
Till lärosätets databas
Hitta mer i SwePub
- Av författaren/redakt...
- Conlon, C. S.
- Conti, G.
- Nemsak, S.
- Pálsson, Gunnar ...
- Moubah, Reda
- Kuo, C. -T
- visa fler...
- Gehlmann, M.
- Ciston, J.
- Rault, J.
- Rueff, J. -P
- Salmassi, F.
- Stolte, W.
- Rattanachata, A.
- Lin, S. -C
- Keqi, A.
- Saw, A.
- Hjörvarsson, Bjö ...
- Fadley, C. S.
- visa färre...
- Om ämnet
-
- NATURVETENSKAP
- NATURVETENSKAP
- och Fysik
- och Den kondenserade ...
- Artiklar i publikationen
- Journal of Appli ...
- Av lärosätet
- Uppsala universitet
Sök utanför SwePub
- Sök vidare i:
- Google Book Search
- Google Scholar
Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.
- Copyright © LIBRIS - Nationella bibliotekssystem
- LIBRIS.kb.se
