Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2001-12-07
Physics
Condensed Matter
Strongly Correlated Electrons
6 pages, 6 figures, Presented at the International Conference on Strongly Correlated Electrons with Orbital Degrees of Freedom
Scientific paper
The physical properties of the antiferroquadrupolar state occurring in TmTe below TQ=1.8 K have been studied using neutron diffraction in applied magnetic fields. A field-induced antiferromagnetic component k = (1/2,1/2,1/2) is observed and, from its magnitude and direction for different orientations of H, an O(2,2) quadrupole order parameter is inferred. Measurements below TN ~= 0.5 K reveal that the magnetic structure is canted, in agreement with theoretical predictions for in-plane antiferromagnetism. Complex domain repopulation effects occur when the field is increased in the ordered phases, with discontinuities in the superstructure peak intensities above 4 T.
Gukasov Arsen
Link Peter
Matsumura Takanori
Mignot Jean-Michel
Suzuki Toshiya
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