M. Staruch, G. Lawes, A. Kumarasiri, Luiz F. Cotica e M. Jain

APPLIED PHYSICS LETTERS – Volume: 102; Issue: 6; Article Number: 062908; DOI: 10.1063/1.4792526

In this work, the structural, electrical, and magnetic properties of orthorhombic TbMnO3 and Tb0.67Ho0.33MnO3 ceramics are presented. The lattice parameters and the Mn-O-Mn bond angle were found to decrease with Ho-substitution as evidenced by Rietveld refinement of the X-ray diffraction data and Raman spectroscopy measurements. A weak ferromagnetic moment was observed in both dc and ac magnetic measurements of the Ho-substituted sample possibly due to spin canting in the antiferromagnetic phase. Tb0.67Ho0.33MnO3 was confirmed to be multiferroicwith appearance of spontaneous polarization below 25 K and an additional increase inpolarization ∼15.5 K associated with the ordering of the Ho3+ moments.