Journal
PHYSICAL REVIEW LETTERS
Volume 108, Issue 25, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.108.257208
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Funding
- U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering [DE-AC02-05CH11231]
- ARO MURI [W911-NF-09-1-0398]
- Stanford Institute for Materials and Energy Science (SIMES)
- LCLS by the US Department of Energy, Office of Basic Energy Sciences
- Nanotechnology Network Project, MEXT, Japan
- Grants-in-Aid for Scientific Research [23560033] Funding Source: KAKEN
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Stoichiometric FeRh undergoes a temperature-induced antiferromagnetic (AFM) to ferromagnetic (FM) transition at similar to 350 K. In this Letter, changes in the electronic structure accompanying this transition are investigated in epitaxial FeRh thin films via bulk-sensitive valence-band and core-level hard x-ray photoelectron spectroscopy with a photon energy of 5.95 keV. Clear differences between the AFM and FM states are observed across the entire valence-band spectrum and these are well reproduced using density-functional theory. Changes in the 2p core levels of Fe are also observed and interpreted using Anderson impurity model calculations. These results indicate that significant electronic structure changes over the entire valence-band region are involved in this AFM-FM transition.
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