Dipolar spin ice under uniaxial pressure
2019; American Physical Society; Volume: 100; Issue: 14 Linguagem: Inglês
10.1103/physrevb.100.144436
ISSN2469-9977
AutoresRichard Edberg, L. Ørduk Sandberg, Ingrid Bakke, Morten Haubro, Laura Folkers, Lucile Mangin-Thro, Andrew Wildes, O. Zaharko, M. Guthrie, A. T. Holmes, Magnus H. Sørby, K. Lefmann, P. P. Deen, P. Henelius,
Tópico(s)Multiferroics and related materials
ResumoThe magnetically frustrated spin ice family of materials is host to numerous exotic phenomena such as magnetic monopole excitations and macroscopic residual entropy extending to low temperature. A finite-temperature ordering transition in the absence of applied fields has not been experimentally observed in the classical spin ice materials ${\mathrm{Dy}}_{2}{\mathrm{Ti}}_{2}{\mathrm{O}}_{7}$ and ${\mathrm{Ho}}_{2}{\mathrm{Ti}}_{2}{\mathrm{O}}_{7}$. Such a transition could be induced by the application of pressure, and in this work we consider the effects of uniaxial pressure on classical spin ice systems. Theoretically, we find that the pressure-induced ordering transition in ${\mathrm{Dy}}_{2}{\mathrm{Ti}}_{2}{\mathrm{O}}_{7}$ is strongly affected by the dipolar interaction. We also report measurements of the neutron structure factor of ${\mathrm{Ho}}_{2}{\mathrm{Ti}}_{2}{\mathrm{O}}_{7}$ under pressure and compare the experimental results to the predictions of our theoretical model.
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