Spin glass-like phase below ∼210 K in magnetoelectric gallium ferrite

Optical Properties of Magnetoelectric Gallium Ferrite

Effect of Site-disorder, Off-stoichiometry and Epitaxial Strain on the 1 Optical Properties of Magnetoelectric Gallium Ferrite 2 3 Amritendu Roy, Somdutta Mukherjee, Surajit Sarkar, Sushil Auluck, Rajendra 4 Prasad, Rajeev Gupta 4 and Ashish Garg 5 6 Department of Materials Science & Engineering, Indian Institute of Technology, 7 Kanpur-208016, India 8 Department of Physics, Indian Institute of...

Electronic structure, Born effective charges and spontaneous polarization in magnetoelectric gallium ferrite.

We present a theoretical study of the structure-property correlation in gallium ferrite, based on first-principles calculations followed by a subsequent comparison with experiments. The local spin density approximation (LSDA + U) of the density functional theory has been used to calculate the ground state structure, electronic band structure, density of states and Born effective charges. The ca...

Gaussian propagators for the Ising spin glass below Tc

The Berry phase in frustrated spin glass

In this letter we have pointed out that frustration in spin glass is realized through the Berry phase due to the conflict between the spin ordering in the course of parallel transport of spinor. We have came to the point that the Berry phase depicting the chiral change of helicity of a quantized spinor is prominent only in the presence of frustration.

Magnetoelectric Effect in Ceramics Based on Bismuth Ferrite

Solid-state sintering method was used to prepare ceramic materials based on bismuth ferrite, i.e., (BiFeO3)1 - x -(BaTiO3) x and Bi1 - x Nd x FeO3 solid solutions and the Aurivillius Bi5Ti3FeO15 compound. The structure of the materials was examined using X-ray diffraction, and the Rietveld method was applied to phase analysis and structure refinement. Magnetoelectric coupling was registered in ...