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Thin films of the spin ice compound Ho2Ti2O 7

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Leusink, D. Coneri, F. Hoek, M. Turner, S. Idrissi, Hosni [UCL] Hilgenkamp, H.

The pyrochlore compounds Ho2Ti2O7 and Dy2Ti2O7 show an exotic form of magnetism called the spin ice state, resulting from the interplay between geometrical frustration and ferromagnetic coupling. A fascinating feature of this state is the appearance of magnetic monopoles as emergent excitations above the degenerate ground state. Over the past years, strong effort has been devoted to the investigation of these monopoles and other properties of the spin ice state in bulk crystals. Here, we report the fabrication of Ho2Ti 2O7 thin films using pulsed laser deposition on yttria-stabilized ZrO2 substrates. We investigated the structural properties of these films by X-ray diffraction, scanning transmission electron microscopy, and atomic force microscopy, and the magnetic properties by vibrating sample magnetometry at 2 K. The films not only show a high crystalline quality, but also exhibit the hallmarks of a spin ice: a pronounced magnetic anisotropy and an intermediate plateau in the magnetization along the [111] crystal direction. © 2014 Author(s).

Document type Article de périodique (Journal article) – Article de recherche
Access type Accès libre
Publication date 2014
Language Anglais
Journal information "APL Materials" - Vol. 2, no. 3 (2014), p. 032101 (1-7) (2014)
Peer reviewed yes
issn 2166-532X
Publication status Publié
Affiliation UCL - SST/IMMC/IMAP - Materials and process engineering
Links
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Bibliographic reference Leusink, D. ; Coneri, F. ; Hoek, M. ; Turner, S. ; Idrissi, Hosni ; et. al. Thin films of the spin ice compound Ho2Ti2O 7. In: APL Materials, Vol. 2, no. 3 (2014), p. 032101 (1-7) (2014)
Permanent URL http://hdl.handle.net/2078.1/160391