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From cooperative paramagnetism to Neel order in Y2Ru2O7: neutron scattering measurements
(American Physical Society, 2008-01-01)
Spin correlations in the pyrochlore antiferromagnet Y2Ru2O7 with Curie-Weiss temperature ΘCW* - 1100 K and critical temperature TN = 77 K were examined through neutron scattering. For TN < T < ΘCW / 3 the data show spin ...
Magnetic inversion symmetry breaking and ferroelectricity in TbMnO3
(American Physical Society, 2005-08-19)
TbMnO3 is an orthorhombic insulator where incommensurate spin order for temperature TN<41 K is accompanied by ferroelectric order for T<28 K. To understand this, we establish the magnetic structure above and below the ...
Spin-lattice order in frustrated ZnCr2O4
(American Physical Society, 2009-07-17)
Using synchrotron x-ray and neutron diffraction, we disentangle spin-lattice order in highly frustrated ZnCr2O4 where magnetic chromium ions occupy the vertices of regular tetrahedra. Upon cooling below 12.5 K the quandary ...
Inhomogeneous level splitting in Pr2-xBixRu2O7
(American Physical Society, 2005-05-06)
We report that Bi doping drives Pr2-xBixRu2O7 from an antiferromagnetic insulator (x=0) to a metallic paramagnet (x≈1) with a broad low T maximum in C/T. Neutron scattering reveals local low energy spin excitations (ℎω≈1 ...