Role of Dy on the magnetic properties of orthorhombic DyFeO3

Abstract

Orthoferrites are a class of magnetic materials with a magnetic ordering temperature above 600 K, predominant G-type antiferromagnetic ordering of the Fe-spin system and, depending on the rare-earth ion, a spin reorientation of the Fe spin taking place at lower temperatures. DyFeO3 is of particular interest since the spin reorientation is classified as a Morin transition with the transition temperature depending strongly on the Dy-Fe interaction. Here, we report a detailed study of the magnetic and structural properties of microcrystalline DyFeO3 powder and bulk single crystal using neutron diffraction and magnetometry between 1.5 and 450 K. We find that, while the magnetic properties of the single crystal are largely as expected, the powder shows strongly modified magnetic properties, including a modified spin reorientation and a smaller Dy-Fe interaction energy of the order of 10 μeV. Subtle structural differences between powder and single crystal show that they belong to distinct magnetic space groups. In addition, the Dy ordering at 2 K in the powder is incommensurate, with a modulation vector of 0.0173(5) c*, corresponding to a periodicity of ~58 unit cells.

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• Enhanced ferroelectric polarization by induced Dy spin-order in multiferroic DyMnO3
• Ground state and magnetic phase transitions of orthoferrite DyFeO_3
• Interplay of 4f-3d Magnetism and Ferroelectricity in DyFeO3
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Cited by in corpus (4)

• Anisotropic signatures in the spin-boson model
• Slow spin dynamics and quantum tunneling of magnetization in the dipolar antiferromagnet DyScO${}_3$
• Room Temperature Dy Spin-Flop Switching in Strained DyFeO3 Thin Films
• Competition Between Multiferroic and Magnetic Soliton Lattice States in DyFeO${}_3$