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Magnetic excitations in the ordered phases of praseodymium hexaboride
Le, M D,McEwen, K A,Park, J-G,Lee, S,Iga, F,Rule, K C IOP Pub 2008 Journal of Physics, Condensed Matter Vol.20 No.10
<P>We have made the first inelastic neutron scattering measurements on single crystal PrB<SUB>6</SUB>, studying the magnetic excitations in the ordered phases. The lowest energy mode has a minimum energy of ≈1.0 meV at the magnetic zone centre, with a significant dispersion along the [001] direction, but very little dispersion along [110]. Interactions out to fourth nearest neighbours are required to explain the [001] dispersion. Measurements of the temperature dependence of the excitations show a strong softening and broadening of the lowest energy mode at the magnetic zone centre between 2 K (commensurate phase) and 5 K (incommensurate phase). </P>
COLD NEUTRON SCATTERING STUDIES OF FRUSTRATEDPYROCHLORE ANTIFERROMAGNETS
J. S. GARDNER,K. C. RULE,J. P. C. RUFF,J. P. CLANCY,B. D. GAULIN 한국원자력학회 2011 Nuclear Engineering and Technology Vol.43 No.1
In this paper we review the neutron scattering work performed on 3 different antiferromagnetic pyrochlores which revealhow the character of the magnetic interactions plays a major role on the eventual outcome of the magnetic ground state.Tb2Ti2O7, Er2Ti2O7and Y2Mo2O7have all been extensively studied over the past 15 years and are known to display,respectively, spin liquid, long range ordered and glassy ground states. Although detailed experiments have been performedon these compounds, and much is known about their low temperature properties, a detailed theoretical understanding of theirground states remains elusive.
COLD NEUTRON SCATTERING STUDIES OF FRUSTRATED PYROCHLORE ANTIFERROMAGNETS
GARDNER, J.S.,RULE, K.C.,RUFF, J.P.C.,CLANCY, J.P.,GAULIN, B.D. Korean Nuclear Society 2011 Nuclear Engineering and Technology Vol.43 No.1
In this paper we review the neutron scattering work performed on 3 different antiferromagnetic pyrochlores which reveal how the character of the magnetic interactions plays a major role on the eventual outcome of the magnetic ground state. $Tb_2Ti_2O_7$, $Er_2Ti_2O_7$ and $Y_2Mo_2O_7$ have all been extensively studied over the past 15 years and are known to display, respectively, spin liquid, long range ordered and glassy ground states. Although detailed experiments have been performed on these compounds, and much is known about their low temperature properties, a detailed theoretical understanding of their ground states remains elusive.