Determining the magnetic configurations of GdCrO3 using high energy neutrons
As a functional material, GdCrO3 is of fundamental scientific interest due to number of significant properties like spin reorientation , magnetoelectric or multiferroic properties and magnetic anisotropy. GdCrO3 is suggested to be ordered in a canted antiferromagnetic structure Γ4 (Gx, Ay, Fz, ; FzR) below Néel temperature (TN) at 170K due to Dzyaloshinsky-Moriya (D-M) exchange coupling between the Cr atoms. There is no report available in literature discussing the neutron diffraction of GdCrO3 due to high absorption of natural Gd atom. Thus, the evolution of magnetic configuration across antiferromagnetic and ferroelectric transitions is still questioned. The proposed experiment aims to study the evolution of magnetic structure of polycrystalline GdCrO3 across TN and ferroelectric temperature. Considering the high energy neutrons as a possible way to determine magnetic structure of highly absorbing materials, we have recently measured the neutron diffraction of SmCrO3 with natural Sm atoms successfully. The present proposal also requires the wavelength λ= 0.5Å neutron at Disordered Materials diffractometer D4 in order to reduce absorption.
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CHATTERJI Tapan; Henry E. Fischer and https://doi.org/10.1103/PhysRevB.96.174421. (2017). Determining the magnetic configurations of GdCrO3 using high energy neutrons. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-31-2516
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