Journal Article

PUBDB-2021-03027

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Bulk spin polarization of magnetite from spin-resolved hard x-ray photoelectron spectroscopy

Schmitt, M.Extern* ; Kirilmaz, O. S.Extern* ; Chernov, S.Extern* ; Babenkov, S.Extern* ; Vasilyev, D.Extern* ; Fedchenko, O.Extern* ; Medjanik, K.Extern* ; Matveev, Y.DESY* ; Gloskovskii, A.DESY* ; Schlueter, C.DESY* ; Winkelmann, A. ; Dudy, L.Extern* ; Elmers, H.-J.Extern* ; Schoenhense, G.Extern* ; Sing, M.Extern* ; Claessen, R.Extern*

2021
Inst. Woodbury, NY

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Please use a persistent id in citations: doi:10.1103/PhysRevB.104.045129  doi:10.3204/PUBDB-2021-03027

Abstract: There is broad consensus that magnetite (Fe$_3$O$_4$) is a promising material for spintronics applications due to its high degree of spin polarization at the Fermi level. However, previous attempts to measure the spin polarization by spin-resolved photoemission spectroscopy have been hampered by the use of low photon energies resulting in high surface sensitivity. The surfaces of magnetite, though, tend to reconstruct due to their polar nature, and thus their magnetic and electronic properties may strongly deviate from each other and from the bulk, dependent on their orientation and specific preparation. In this study, we determine the intrinsic—i.e., bulk—spin polarization of magnetite by spin-resolved photoelectron spectroscopy on (111)-oriented thin films, epitaxially grown on ZnO(0001), with hard x-rays, making it a truly bulk-sensitive probe. This becomes possible by using a novel, specially adapted momentum microscope, featuring time-of-flight energy recording and an imaging spin-filter.

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Contributing Institute(s):

1. FS-Photon Science (FS-PS)
2. Experimentebetreuung PETRA III (FS-PET-D)
3. Experimentebetreuung PETRA III (FS-PET-S)

Research Program(s):

1. 632 - Materials – Quantum, Complex and Functional Materials (POF4-632) (POF4-632)
2. 6G3 - PETRA III (DESY) (POF4-6G3) (POF4-6G3)
3. FS-Proposal: I-20181063 (I-20181063) (I-20181063)
4. FS-Proposal: I-20181092 (I-20181092) (I-20181092)
5. FS-Proposal: I-20190546 (I-20190546) (I-20190546)
6. DFG project 390858490 - EXC 2147: Komplexität und Topologie in Quantenmaterialien (CT.QMAT) (390858490) (390858490)

Experiment(s):

1. PETRA Beamline P22 (PETRA III)

Appears in the scientific report 2021

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Electronics and Telecommunications Collection ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; Essential Science Indicators ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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