Strong ferromagnetism at the surface of an antiferromagnet caused by buried magnetic moments

A. Chikina, M. Höppner, S. Seiro, K. Kummer, S. Danzenbächer, S. Patil, A. Generalov, M. Güttler, Yu Kucherenko, E. V. Chulkov, Yu M. Koroteev, K. Köpernik, C. Geibel, M. Shi, M. Radovic, C. Laubschat, D. V. Vyalikh

Research output: Contribution to journalArticle

14 Citations (Scopus)

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 languageEnglish
Article number3171
JournalNature Communications
Volume5
DOIs
Publication statusPublished - 21 Jan 2014
Externally publishedYes

Fingerprint

Ferromagnetism
Magnetic moments
ferromagnetism
magnetic moments
Temperature
Exchange interactions
Europium
Magnetic devices
Two dimensional electron gas
Magnetic materials
Surface states
europium
assembling
bears
Gases
magnetic materials
Electrons
temperature
electron gas
Equipment and Supplies

ASJC Scopus subject areas

  • Chemistry(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Physics and Astronomy(all)

Cite this

Chikina, A., Höppner, M., Seiro, S., Kummer, K., Danzenbächer, S., Patil, S., ... Vyalikh, D. V. (2014). Strong ferromagnetism at the surface of an antiferromagnet caused by buried magnetic moments. Nature Communications, 5, [3171]. https://doi.org/10.1038/ncomms4171

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 journalArticle

Chikina, A, Höppner, M, Seiro, S, Kummer, K, Danzenbächer, S, Patil, S, Generalov, A, Güttler, M, Kucherenko, Y, Chulkov, EV, Koroteev, YM, Köpernik, K, Geibel, C, Shi, M, Radovic, M, Laubschat, C & Vyalikh, DV 2014, 'Strong ferromagnetism at the surface of an antiferromagnet caused by buried magnetic moments', Nature Communications, vol. 5, 3171. https://doi.org/10.1038/ncomms4171
Chikina A, Höppner M, Seiro S, Kummer K, Danzenbächer S, Patil S et al. Strong ferromagnetism at the surface of an antiferromagnet caused by buried magnetic moments. Nature Communications. 2014 Jan 21;5. 3171. https://doi.org/10.1038/ncomms4171
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. / Strong ferromagnetism at the surface of an antiferromagnet caused by buried magnetic moments. In: Nature Communications. 2014 ; Vol. 5.
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AU - Geibel, C.

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