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Coupling of lattice and spin degrees of freedom in GdB6

McMorrow, DF; McEwen, KA; Park, JG; Lee, S; Mannix, D; Iga, F; Takabatake, T; (2004) Coupling of lattice and spin degrees of freedom in GdB6. PHYSICA B-CONDENSED MATTER , 345 (1-4) 66 - 69. 10.1016/j.physb.2003.11.022.

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A detailed X-ray scattering study of the phase transitions in GdB6 has been performed. For photon energies away from resonance, peaks are observed with two distinct wave vectors of q(1) (0 0 1/2) and q(2) = (1/2 1/2 0) at low temperatures. These are shown to arise from distortions of the lattice, although an earlier study had attributed them to competing magnetic-order parameters [J. Appl. Phys. 63 (1998) 3580]. With the photon energy tuned to the Gd L-2 edge, a third set of peaks with q(3) = (1/4 1/4 1/2) was discovered. This is shown to be the true magnetic-order parameter. Our results reveal a surprisingly rich interaction between the lattice and spin degrees of freedom in this compound. (C) 2003 Elsevier B.V. All rights reserved.

Title:Coupling of lattice and spin degrees of freedom in GdB6
Location:San Servolo Venice Int Univ Campus, Venice, ITALY
Keywords:X-ray magnetic scattering, antiferromagnetism, lattice distortion, SCATTERING
UCL classification:UCL > School of BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology

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