Abstract
The Y2Co7-xFexB3 compounds form solid solutions in the composition range x≤2. Magnetic measurements were performed in
the temperature range 4.2 – 800 K. The compounds are ferromagnetically ordered. Both Curie temperatures and saturation
magnetizations increase when cobalt is substituted by iron. Band structure calculations on Y2Co7B3 show that cobalt moments
are sensitive to their local environments. A negative polarization is induced on Y4d bands. The mean cobalt moments, at 4.2
K, vary from 0.3 μB (x=0) to 0.7 μB (x=2), while iron shows a more localized behaviour. The effective cobalt and iron moments
seems to be only little dependent on composition.
Keywords
Rare earth-transition metal compounds, Band structures.
Citation
E. BURZO, I. G. POP, V. POP, P. VLAIC, Magnetic properties and electronic structure of Y2Co7-xFexB compounds, Optoelectronics and Advanced Materials - Rapid Communications, 3, 5, May 2009, pp.481-483 (2009).
Submitted at: April 24, 2009
Accepted at: May 25, 2009