Spin correlation in the quasi-1D spin glass FeMgBO4 |
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| Authors: | A Wiedenmann P Burlet H Scheuer P Convert |
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| Institution: | Centre d''Etudes Nucléaires de Grenoble, Département de Recherche Fondamentale, Laboratoire de Diffraction Neutronique, 85 X, 38041 Grenoble Cedex, France;Institut Max Von Laue-Paul Langevin, 38042 Grenoble Cedex, France |
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| Abstract: | In FeMgBO4 Fe3+ ions form isolated zig-zag chains cut off by Mg2+ impurities. The magnetic diffuse neutron scattering measured at different temperatures can be described by 1D spin correlations within the chain segments. Isotropic first and second neighbour interactions lead to a short-range helical spin arrangement which is perturbed at each diamagnetic impurity. Spin pair correlations increase with decreasing temperature down to 15 K where they reach saturation values reflecting a spin glass state. |
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