A Neutron Diffraction Study of Magnetic Ordering in Iron Telluride.

Abstract

The alignment of magnetic spins in iron telluride Fe1.11Te below and above a lambda transition point occurring at 63K has been investigated by neutron diffraction. Fe1.11Te is ferrimagnetic at liquid helium temperature with magnetic spins pointing in a direction perpendicular to the crystallographics unique axis. At room temperature Fe1.11Te is ferromagnetic with spins aligned along this axis. The magnetic moment derived from neutron measurements is 1.8 Bohr magnetons at 4K. The 0.22 additional iron atoms per unit cell are distributed at random in the octahedral holes of the tellurium lattice.