Abstract
Carrying a large, pure spin magnetic moment of 7 μB per atom in the half-filled 4f shell, divalent europium is an outstanding element for assembling novel magnetic devices in which a two-dimensional electron gas may be polarized due to exchange interaction with an underlying magnetically-active Eu layer. Here we show that the Si-Rh-Si surface trilayer of the antiferromagnet EuRh 2 Si 2 bears a surface state, which exhibits an unexpected and large spin splitting controllable by temperature. The splitting sets in below ∼32.5 K, well above the ordering temperature of the Eu 4f moments (∼24.5 K) in the bulk, indicating a larger ordering temperature in the topmost Eu layers. The driving force for the itinerant ferromagnetism at the surface is the aforementioned exchange interaction. Such a splitting may also be induced into states of functional surface layers deposited onto the surface of EuRh 2 Si 2 or similarly ordered magnetic materials with metallic or semiconducting properties.
| Original language | English |
|---|---|
| Article number | 3171 |
| Journal | Nature Communications |
| Volume | 5 |
| DOIs | |
| Publication status | Published - 21 Jan 2014 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Chemistry(all)
- Biochemistry, Genetics and Molecular Biology(all)
- Physics and Astronomy(all)
Cite this
Strong ferromagnetism at the surface of an antiferromagnet caused by buried magnetic moments. / Chikina, A.; Höppner, M.; Seiro, S.; Kummer, K.; Danzenbächer, S.; Patil, S.; Generalov, A.; Güttler, M.; Kucherenko, Yu; Chulkov, E. V.; Koroteev, Yu M.; Köpernik, K.; Geibel, C.; Shi, M.; Radovic, M.; Laubschat, C.; Vyalikh, D. V.
In: Nature Communications, Vol. 5, 3171, 21.01.2014.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Strong ferromagnetism at the surface of an antiferromagnet caused by buried magnetic moments
AU - Chikina, A.
AU - Höppner, M.
AU - Seiro, S.
AU - Kummer, K.
AU - Danzenbächer, S.
AU - Patil, S.
AU - Generalov, A.
AU - Güttler, M.
AU - Kucherenko, Yu
AU - Chulkov, E. V.
AU - Koroteev, Yu M.
AU - Köpernik, K.
AU - Geibel, C.
AU - Shi, M.
AU - Radovic, M.
AU - Laubschat, C.
AU - Vyalikh, D. V.
PY - 2014/1/21
Y1 - 2014/1/21
N2 - Carrying a large, pure spin magnetic moment of 7 μB per atom in the half-filled 4f shell, divalent europium is an outstanding element for assembling novel magnetic devices in which a two-dimensional electron gas may be polarized due to exchange interaction with an underlying magnetically-active Eu layer. Here we show that the Si-Rh-Si surface trilayer of the antiferromagnet EuRh 2 Si 2 bears a surface state, which exhibits an unexpected and large spin splitting controllable by temperature. The splitting sets in below ∼32.5 K, well above the ordering temperature of the Eu 4f moments (∼24.5 K) in the bulk, indicating a larger ordering temperature in the topmost Eu layers. The driving force for the itinerant ferromagnetism at the surface is the aforementioned exchange interaction. Such a splitting may also be induced into states of functional surface layers deposited onto the surface of EuRh 2 Si 2 or similarly ordered magnetic materials with metallic or semiconducting properties.
AB - Carrying a large, pure spin magnetic moment of 7 μB per atom in the half-filled 4f shell, divalent europium is an outstanding element for assembling novel magnetic devices in which a two-dimensional electron gas may be polarized due to exchange interaction with an underlying magnetically-active Eu layer. Here we show that the Si-Rh-Si surface trilayer of the antiferromagnet EuRh 2 Si 2 bears a surface state, which exhibits an unexpected and large spin splitting controllable by temperature. The splitting sets in below ∼32.5 K, well above the ordering temperature of the Eu 4f moments (∼24.5 K) in the bulk, indicating a larger ordering temperature in the topmost Eu layers. The driving force for the itinerant ferromagnetism at the surface is the aforementioned exchange interaction. Such a splitting may also be induced into states of functional surface layers deposited onto the surface of EuRh 2 Si 2 or similarly ordered magnetic materials with metallic or semiconducting properties.
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U2 - 10.1038/ncomms4171
DO - 10.1038/ncomms4171
M3 - Article
VL - 5
JO - Nature Communications
JF - Nature Communications
SN - 2041-1723
M1 - 3171
ER -