Spin ice and soft spin ice ground state under high pressure: comparative study by neutron scattering

摘要

We performed high pressure neutron diffraction experiments in two geometrically frustrated pyrochlore magnets. The soft spin ice Tb₂Sn₂O₇ was studied up to 4.6Â GPa and down to 60Â mK. Its ordered spin ice structure with k ₀=0 propagation vector partly transforms under pressure into a magnetic structure with k ₁=(0 0 1). The reduction of the total ordered Tb moment with respect to ambient pressure suggests that spin liquid fluctuations are also enhanced by pressure. The pressure-induced state is discussed by considering the influence of both isotropic pressure and stress. In contrast, in the true spin ice Ho₂Ti₂O₇, no effect of pressure is observed up to 6Â GPa and down to 1.4Â K.View full textDownload full textKeywordsgeometrical frustration, spin ice, high pressure, neutron diffractionRelated var addthis_config = { ui_cobrand: "Taylor & Francis Online", services_compact: "citeulike,netvibes,twitter,technorati,delicious,linkedin,facebook,stumbleupon,digg,google,more", pubid: "ra-4dff56cd6bb1830b" }; Add to shortlist Link Permalink http://dx.doi.org/10.1080/08957950903385005