Etude par diffraction neutronique de l'ilmenite ferrimagnetique NiMnO3 |
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| Authors: | M Pernet JC Joubert B Ferrand |
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| Institution: | Laboratoire des Rayons X, C.N.R.S. B.P. No. 166, Centre de Tri, 38042 Grenoble Cedex, France;Laboratoire de Cristallogénèse, LETI C.E.N.-G.B.P. No. 85, Centre de Tri, 38041 Grenoble Cedex, France |
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| Abstract: | The magnetic structure of ferrimagnetic ilmenite Ni2+Mn4+O3 has been investigated by neutron diffraction. Below the Curie temperature (164°C), the spins are oriented into two kinds of ferromagnetic planes perpendicular to the 111] rhomboedral axis, one containing Mn4+ and the other Ni2+ cation. Two successive planes are coupled antiferromagnetically. The experimental magnetic moments are respectively found equal to 1.8 and 2.2 μB for Ni2+ and Mn4+ at room temperature. The positional atomic parameters have been redetermined from nuclear diffraction data taken above the Curie temperature. |
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