Magnetic properties of Dy nano-islands on graphene
Abstract
Here, we have determined the magnetic properties of epitaxially grown Dy islands on graphene/SiC(0001) that are passivated by a gold film (deposited in the ultra-high vacuum growth chamber) for ex-situ X-ray magnetic circular dichroism (XMCD). Our sum-rule analysis of the Dy M4,5 XMCD spectra at low temperatures (T = 15 K) as a function of magnetic field assuming Dy3+ (spin configuration 6H15/2) indicate that the projection of the magnetic moment along an applied magnetic field of 5 T is 3.5(3) μB. Temperature dependence of the magnetic moment (extracted from the M5 XMCD spectra) shows an onset of a change in magnetic moment at about 175 K in proximity of the transition from paramagnetic to helical magnetic structure at TH = 179 K in bulk Dy. No feature at the vicinity of the ferromagnetic transition of hcp bulk Dy at Tc = 88 K is observed. However, below ~130 K, the inverse magnetic moment (extracted from the XMCD) is linear in temperature as commonly expected from a paramagnetic system suggesting different behavior of Dy nano-island than bulk Dy.
- Authors:
-
- Ames Lab. and Iowa State Univ., Ames, IA (United States)
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Publication Date:
- Research Org.:
- Ames Laboratory (AMES), Ames, IA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1371900
- Alternate Identifier(s):
- OSTI ID: 1415891
- Report Number(s):
- IS-J-9343
Journal ID: ISSN 0304-8853; PII: S0304885316328591
- Grant/Contract Number:
- AC02-07CH11358; AC02-06CH11357
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Magnetism and Magnetic Materials
- Additional Journal Information:
- Journal Volume: 435; Journal Issue: C; Journal ID: ISSN 0304-8853
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; dysprosium nano-islands; XMCD; STM
Citation Formats
Anderson, Nathaniel A., Zhang, Qiang, Hupalo, Myron, Rosenberg, Richard A., Freeland, John W., Tringides, Michael C., and Vaknin, David. Magnetic properties of Dy nano-islands on graphene. United States: N. p., 2017.
Web. doi:10.1016/j.jmmm.2017.04.007.
Anderson, Nathaniel A., Zhang, Qiang, Hupalo, Myron, Rosenberg, Richard A., Freeland, John W., Tringides, Michael C., & Vaknin, David. Magnetic properties of Dy nano-islands on graphene. United States. https://doi.org/10.1016/j.jmmm.2017.04.007
Anderson, Nathaniel A., Zhang, Qiang, Hupalo, Myron, Rosenberg, Richard A., Freeland, John W., Tringides, Michael C., and Vaknin, David. Fri .
"Magnetic properties of Dy nano-islands on graphene". United States. https://doi.org/10.1016/j.jmmm.2017.04.007. https://www.osti.gov/servlets/purl/1371900.
@article{osti_1371900,
title = {Magnetic properties of Dy nano-islands on graphene},
author = {Anderson, Nathaniel A. and Zhang, Qiang and Hupalo, Myron and Rosenberg, Richard A. and Freeland, John W. and Tringides, Michael C. and Vaknin, David},
abstractNote = {Here, we have determined the magnetic properties of epitaxially grown Dy islands on graphene/SiC(0001) that are passivated by a gold film (deposited in the ultra-high vacuum growth chamber) for ex-situ X-ray magnetic circular dichroism (XMCD). Our sum-rule analysis of the Dy M4,5 XMCD spectra at low temperatures (T = 15 K) as a function of magnetic field assuming Dy3+ (spin configuration 6H15/2) indicate that the projection of the magnetic moment along an applied magnetic field of 5 T is 3.5(3) μB. Temperature dependence of the magnetic moment (extracted from the M5 XMCD spectra) shows an onset of a change in magnetic moment at about 175 K in proximity of the transition from paramagnetic to helical magnetic structure at TH = 179 K in bulk Dy. No feature at the vicinity of the ferromagnetic transition of hcp bulk Dy at Tc = 88 K is observed. However, below ~130 K, the inverse magnetic moment (extracted from the XMCD) is linear in temperature as commonly expected from a paramagnetic system suggesting different behavior of Dy nano-island than bulk Dy.},
doi = {10.1016/j.jmmm.2017.04.007},
journal = {Journal of Magnetism and Magnetic Materials},
number = C,
volume = 435,
place = {United States},
year = {Fri Apr 07 00:00:00 EDT 2017},
month = {Fri Apr 07 00:00:00 EDT 2017}
}
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