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Multi-magnetic phases in Fe1−xNixTa2O6 |
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| Authors: | SR Oliveira Neto EJ Kinast O Isnard MA Gusmo CA dos Santos JBM da Cunha |
| Institution: | aInstituto de Física, Universidade Federal do Rio Grande do Sul, C.P. 15051, 91501-970 Porto Alegre, Brazil bUniversidade Estadual do Rio Grande do Sul, Rua 7 de Setembro, 1156, 90010-191 Porto Alegre, Brazil cInstitut Néel, CNRS, associé à l’Université J. Fourier et à l’INPG, B.P. 166, 38042 Grenoble Cedex 9, France |
| Abstract: | X-ray, neutron diffraction and magnetic susceptibility are reported for FexNi1−xTa2O6 mixed oxides. X-ray refinement indicates homogeneous samples for all the reported concentrations. The neutron-diffraction measurements reveal magnetic structures with double propagation vectors. This system exhibits at least two bicritical points at about x=0.15 and 0.60. For these concentrations, at low temperatures, the system shows the coexistence of two magnetic structures. This bicritical behaviour is interpreted as induced by competition between the different magnetic structures. |
| Keywords: | Neutron diffraction Magnetic phases coexistence |
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