TY  - JOUR
AU  - Lytvynenko, Y.
AU  - Fedchenko, O.
AU  - Chernov, S. V.
AU  - Babenkov, S.
AU  - Vasilyev, Dmitry
AU  - Tkach, O.
AU  - Gloskovskii, A.
AU  - Peixoto, T. R. F.
AU  - Schlueter, C.
AU  - Grigorev, V.
AU  - Filianina, M.
AU  - Sobolev, S.
AU  - Kleibert, A.
AU  - Kläui, M.
AU  - Demsar, J.
AU  - Schoenhense, Gerd
AU  - Jourdan, M.
AU  - Elmers, Hans-Joachim
TI  - Control of the asymmetric band structure in Mn<sub>2</sub>Au by a ferromagnetic driver layer
JO  - Physical review / B
VL  - 108
IS  - 10
SN  - 2469-9950
CY  - Woodbury, NY
PB  - APS
M1  - PUBDB-2024-01786
SP  - 104413
PY  - 2023
AB  - Hard x-ray angle-resolved photoemission spectroscopy reveals the momentum-resolved band structure in an epitaxial Mn<sub>2</sub>Au(001) film capped by a 2-nm-thick ferromagnetic permalloy layer. By magnetizing the permalloy capping layer, the exceptionally strong exchange bias aligns the Néel vector in the Mn<sub>2</sub>Au(001) film accordingly. Uncompensated interface Mn magnetic moments in Mn<sub>2</sub>Au were identified as the origin of the exchange bias using x-ray magnetic circular dichroism in combination with photoelectron emission microscopy. Using time-of-flight momentum microscopy, we measure the asymmetry of the band structure, E(k)≠E(−k), in Mn<sub>2</sub>Au resulting from the homogeneous orientation of the Néel vector. Comparison with theory shows that the Néel vector, determined by the magnetic moment of the top Mn layer, is antiparallel to the permalloy magnetization. The experimental results demonstrate that hard x-ray photoemission spectroscopy can measure the band structure of epitaxial layers beneath a metallic capping layer and corroborate the asymmetric band structure in Mn<sub>2</sub>Au that was previously inferred only indirectly.  
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:001127441900003
DO  - DOI:10.1103/PhysRevB.108.104413
UR  - https://bib-pubdb1.desy.de/record/607143
ER  -