K Absorption Edge Magnetic Circular-X-Ray Dichroism of Fe-Ni Alloys

K.J. Gofron; C.W. Kimball; P.L. Lee; G. Jennings; P.A. Montano

doi:doi:10.1051/jp4/1997034

Numéro		J. Phys. IV France Volume 7, Numéro C2, Avril 1997 Proceedings of the 9th International Conference on X-Ray Absorption Fine Structure


Page(s)		C2-421 - C2-424
DOI		https://doi.org/10.1051/jp4/1997034

Proceedings of the 9th International Conference on X-Ray Absorption Fine Structure

J. Phys. IV France 7 (1997) C2-421-C2-424
DOI: 10.1051/jp4/1997034

K Absorption Edge Magnetic Circular-X-Ray Dichroism of Fe-Ni Alloys

K.J. Gofron^{1, 2}, C.W. Kimball^{1, 2}, P.L. Lee¹, G. Jennings¹ and P.A. Montano^{1, 3}

¹ Materials Science Division Argonne National Laboratory, Argonne, IL 60439, U.S.A.
² Department of Physics, Northern Illinois University, DeKalb, IL 60115, U.S.A.
³ Department ofPhysics, University of Illinois-Chicago, Chicago, IL 60680, U.S.A.

Abstract
We report Magnetic Circular X-ray Dichroism (MCXD) measurements in Fe-Ni alloys. We used an energy dispersive beamline in our measurements. A polychromator spectrum contains self reference both in intensity and energy since all energies are measured at the same time and remain stable during an energy scan since no movement of the X-ray optics is necessary. We measured the K absorption edges in Fe and Ni (s - p electronic states) in the à ferromagnetic alloys of Fe-Ni. We observe that the signal at the invar composition is of comparable strengh as other compositions in contrast to previous studies. We used cold rolled (disordered) foils instead of powders. The measurements reveal changes of the MCXD signal with composition and crystal structure.