We have investigated how the surface magnetism of epitaxial La 0.67Sr0.33MnO3 films on NdGaO3 substrates is modified by 2 nm-thick caps of the undoped manganite LaMnO 3 and the band insulator SrTiO3. Low-temperature photoemission electron microscopy images with x-ray magnetic circular dichroism contrast reveal large ferromagnetic domains, and a reduction of surface Curie temperature by 40 K (LaMnO3 cap) and 70 K (SrTiO3 cap). We use these negative results to argue that capped films of sub-optimally doped La1-xSrxMnO3 (x≠0.33) should improve the operating temperature of all-oxide and other spintronic devices. © 2013 Elsevier B.V.

Tuning La0.67Sr0.33MnO3 surface magnetism using LaMnO3 and SrTiO3 caps / Phillips, L.C.; Maccherozzi, F.; Moya, X.; Ghidini, M.; Yan, W.; Soussi, J.; Dhesi, S.S.; Mathur, N.D. - In: JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS. - ISSN 0304-8853. - 355(2014), pp. 331-338. [10.1016/j.jmmm.2013.10.024]

Tuning La0.67Sr0.33MnO3 surface magnetism using LaMnO3 and SrTiO3 caps

GHIDINI, Massimo;
2014

Abstract

We have investigated how the surface magnetism of epitaxial La 0.67Sr0.33MnO3 films on NdGaO3 substrates is modified by 2 nm-thick caps of the undoped manganite LaMnO 3 and the band insulator SrTiO3. Low-temperature photoemission electron microscopy images with x-ray magnetic circular dichroism contrast reveal large ferromagnetic domains, and a reduction of surface Curie temperature by 40 K (LaMnO3 cap) and 70 K (SrTiO3 cap). We use these negative results to argue that capped films of sub-optimally doped La1-xSrxMnO3 (x≠0.33) should improve the operating temperature of all-oxide and other spintronic devices. © 2013 Elsevier B.V.
Tuning La0.67Sr0.33MnO3 surface magnetism using LaMnO3 and SrTiO3 caps / Phillips, L.C.; Maccherozzi, F.; Moya, X.; Ghidini, M.; Yan, W.; Soussi, J.; Dhesi, S.S.; Mathur, N.D. - In: JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS. - ISSN 0304-8853. - 355(2014), pp. 331-338. [10.1016/j.jmmm.2013.10.024]
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11381/2815745
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 3
  • ???jsp.display-item.citation.isi??? 2
social impact