Electronic and magnetic properties of the Fe(1-x)CoxSi alloys

JAVIER GUEVARA; VERONICA LAURA VILDOSOLA; JULIAN MILANO; ANA MARÍA LLOIS

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

Año: 2002 vol. 320 p. 388 - 391

0304-8853

The alloy Fe(1-x)CoxSi shows a remarkable behaviour, while the two extremes are both nonmagnetic almost all the intermediates show magnetic order, specially in the Fe-rich region. We present here ab initio calculations within the LSDA approximation for these compounds and show that they behave as half metals for x<0.25. This explains the linear dependence on x of the magnetic moment in this region. We also explain the magnetic behaviour for largerconcentrations.