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Chang, L.-J.; Su, Y.*; Kao, Y.-J.*; Chou, Y. Z.*; 加倉井 和久; Mittal, R.*; Schneider, H.*; Brckel, T.*; Balakrishnan, G.*; Lees, M. R.*
Physica B; Condensed Matter, 406(12), p.2393 - 2396, 2011/06
被引用回数:1 パーセンタイル:4.87(Physics, Condensed Matter)Diffuse polarized neutron scattering studies have been carried out on single crystals of pyrochlore spin ice HoY
Ti
O
(x = 0, 0.3, and 1) to investigate the effects of doping and anisotropy on spin correlations in the system. For all the samples studied the spin flip (SF) diffuse scattering (i.e. the in-plane component) reveals that the spin correlations can be described using a nearest-neighbour spin ice model (NNSM) at higher temperatures (
= 3.6 K) and a dipolar spin ice model (DSM) as the temperature is reduced (
= 30 mK). In this paper, we focus on the experimental results of the highly doped spin ice HoYTi
O
and compare our results with pure spin ice Ho
Ti
O
.
Chang, L.-J.; Su, Y.*; Kao, Y.-J.*; Chou, Y. Z.*; Mittal, R.*; Schneider, H.*; Brueckel, T.*; Balakrishnan, G.*; Lees, M. R.*
no journal, ,
Diffuse polarized neutron scatterings have been carried out on the pyrochlore spin ice HoY
Ti
O
(x = 0, 0.3 and 1) single crystals to investigate the doping effects and anisotropy of spin correlations in the system. The crystals were aligned in the (1-10) orientation to coincide with the direction of neutron polarization. The spin flip diffuse scattering (i.e. the in-plane component) reveals an anomalous crossover in the spin correlations from the nearest-neighbor spin ice correlation to a typical dipolar spin ice correlation as the temperature is reduced for all the samples. A signature of strong antiferromagnetic correlation is observed in the non-spin flip channel (i.e. the out-of-plane component), at the same temperatures where the dipolar spin ice correlation appears in the spin flip channel.