Study of spin reorientation transitions in TmCr1-xFexO3 perovskites (x = 0.6-0.9) by neutron powder diffraction
Multiferroic and magnetoelectric materials have gained notoriety due to potential technological applications. Recently, a study on weakly ferromagnetic perovskite system YCr1-xMxO3 (M= Fe or Mn) found ferroelectricity induced by disordered cations of non-equivalent spins at B-site. This holds interesting possibilities for the design of new materials. As a first approximation of tuning transition temperatures in this system, we synthesized four novel simple perovskites TmCr1-xFexO3 with x= 0.6-0.9. Structural characterization was performed with XRPD at room temperature using Rietveld refinement. All samples are orthorhombic and belong to Pbnm space group. Magnetic susceptibility versus temperature was measured. Magnetic order begins at TN < Tamb for all samples. As temperature decreases, a complex magnetic behaviour appears. There is a marked susceptibility increase around 120 K, followed by a sharp decrease. This behaviour is usually associated with a spin reorientation transition, which consists in a shift in the easy axis of the magnetic coupling. We aim to closely follow this transition using both high intensity and high resolution neutron powder diffraction.
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Raul E. Carbonio; BOLLETTA Juan Pablo; CUELLO Gabriel; MARTIN Christine; MATSUBARA Nami and NASSIF Vivian. (2018). Study of spin reorientation transitions in TmCr1-xFexO3 perovskites (x = 0.6-0.9) by neutron powder diffraction. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-31-2575
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