Intercalated europium metal in epitaxial graphene on SiC
Abstract
X-ray magnetic circular dichroism (XMCD) reveals the magnetic properties of intercalated europium metal under graphene on SiC(0001). The intercalation of Eu nanoclusters (average size 2.5 nm) between graphene and SiC substate are formed by deposition of Eu on epitaxially grown graphene that is subsequently annealed at various temperatures while keeping the integrity of the graphene layer. Using sum-rules analysis of the XMCD of Eu M-4,M-5 edges at T = 15 K, our samples show paramagnetic-like behavior with distinct anomaly at T approximate to 90 K, which may be related to the Neel transition, T-N = 91 K, of bulk metal Eu. We find no evidence of ferromagnetism due to EuO or antiferromagnetism due to Eu2O3, indicating that the graphene layer protects the intercalated metallic Eu against oxidation over months of exposure to atmospheric environment.
- Authors:
-
- Ames Lab. and Iowa State Univ., Ames, IA (United States). Dept. of Physics and Astronomy
- Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS), X-ray Science Division
- Publication Date:
- Research Org.:
- Ames Lab., Ames, IA (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1415795
- Alternate Identifier(s):
- OSTI ID: 1404744; OSTI ID: 1461416
- Report Number(s):
- IS-J-9524
Journal ID: ISSN 2475-9953; PRMHAR; TRN: US1800853
- Grant/Contract Number:
- AC02-07CH11358; AC02-06CH11357
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review Materials
- Additional Journal Information:
- Journal Volume: 1; Journal Issue: 5; Journal ID: ISSN 2475-9953
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; Magnetism; Graphene; X-ray magnetic circular dichroism
Citation Formats
Anderson, Nathaniel, Hupalo, Myron, Keavney, David, Tringides, Michael C., and Vaknin, David. Intercalated europium metal in epitaxial graphene on SiC. United States: N. p., 2017.
Web. doi:10.1103/PhysRevMaterials.1.054005.
Anderson, Nathaniel, Hupalo, Myron, Keavney, David, Tringides, Michael C., & Vaknin, David. Intercalated europium metal in epitaxial graphene on SiC. United States. https://doi.org/10.1103/PhysRevMaterials.1.054005
Anderson, Nathaniel, Hupalo, Myron, Keavney, David, Tringides, Michael C., and Vaknin, David. Wed .
"Intercalated europium metal in epitaxial graphene on SiC". United States. https://doi.org/10.1103/PhysRevMaterials.1.054005. https://www.osti.gov/servlets/purl/1415795.
@article{osti_1415795,
title = {Intercalated europium metal in epitaxial graphene on SiC},
author = {Anderson, Nathaniel and Hupalo, Myron and Keavney, David and Tringides, Michael C. and Vaknin, David},
abstractNote = {X-ray magnetic circular dichroism (XMCD) reveals the magnetic properties of intercalated europium metal under graphene on SiC(0001). The intercalation of Eu nanoclusters (average size 2.5 nm) between graphene and SiC substate are formed by deposition of Eu on epitaxially grown graphene that is subsequently annealed at various temperatures while keeping the integrity of the graphene layer. Using sum-rules analysis of the XMCD of Eu M-4,M-5 edges at T = 15 K, our samples show paramagnetic-like behavior with distinct anomaly at T approximate to 90 K, which may be related to the Neel transition, T-N = 91 K, of bulk metal Eu. We find no evidence of ferromagnetism due to EuO or antiferromagnetism due to Eu2O3, indicating that the graphene layer protects the intercalated metallic Eu against oxidation over months of exposure to atmospheric environment.},
doi = {10.1103/PhysRevMaterials.1.054005},
journal = {Physical Review Materials},
number = 5,
volume = 1,
place = {United States},
year = {Wed Oct 25 00:00:00 EDT 2017},
month = {Wed Oct 25 00:00:00 EDT 2017}
}
Web of Science
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