Fe magnetic moment formation and exchange interaction in Fe2P: A first-principles study

Re-entrant spin glass like behaviour of (Fe0.90Cr0.05Ni0.05)2P

Magnetic behaviour of di-metal iron phosphide with a small substitution of iron by chromium, (Fe0.97Cr0.03)2P, has been studied using SQUID magnetometry and powder neutron diffraction. It is paramagnetic at temperatures above ∼180 K with persisting short range ferromagnetic (FM) order. At lower temperatures three different regions of magnetic behaviour are identified. FM order evolves in the region 180 K-120 K but much more slowly and with much less magnetic moments than in Fe2P. In the region 120 K-50 K negative exchange interactions gain some importance leading to a loss of FM order. Below 50 K FM interactions again dominate. Pinning centres influence the behaviour at low temperature up to ∼100 K.

Magnetic structure of (Fe0.97Cr0.03)2P

X-ray diffraction, Mössbauer spectrometry and thermal studies of the mechanically alloyed (Fe1−xMnx)2P powders

On June 2, 2012 it would have been the eighty fifth birthday of Edwald Abramovitch Zavadskii (1927-2005), corresponding member of the National Academy of Sciences, brilliant experimental physicist and a person with a very uncommon and vibrant life.

L.I. Medvedeva

Papers

Magnetic phase transformations in nonstoichiometric iron phosphide