Structure and magnetism of pseudobinary L 1 0 alloy FePtM ( M = Ir , Au )

 

.Kazuhiko Uebayashia
 

Divisions of Physics, Akita 

National College of Technology, Akita 011-8511, Japan
 

Presented 19 January 2010; received 3 November 2009; accepted 3 March 2010;published online 21 April 2010 

Abstract

We performed energy-band calculations for the L10 pseudobinary bulk alloy FePt1−xMx
M=Ir,Au  by using the linear muffin-tin orbital method with atomic sphere approximations. The exchange-correlation potential was treated within the generalized gradient approximation. The total energies for the ferromagnetic
FM and three kinds of antiferromagnetic
AFM states were estimated as a function of lattice ratioc/a
. For 5d atom substitution, we adopted a virtual crystal approximation. On the basis of the minimum of the total energy, we present the following result: achange in magnetic state
FM-AFM occurs around FePt1−xMx. It is pointed out that the magneticstate change also depends on the number of valence electrons. 

 

https://sci-hub.se/https://doi.org/10.1063/1.3369973