Distinguishing magnetic-moment and magnetic-ordering behavior on the Slater-Pauling curve

R. F. Willis; N. Janke-Gilman

doi:doi:10.1209/epl/i2004-10359-2

Europhys. Lett., 69 (3), pp. 411-416 (2005)
DOI: 10.1209/epl/i2004-10359-2

Distinguishing magnetic-moment and magnetic-ordering behavior on the Slater-Pauling curve

R. F. Willis and N. Janke-Gilman

Department of Physics, The Pennsylvania State University - PA 16802, USA

received 14 September 2004; accepted in final form 22 November 2004
published online 24 December 2004

Abstract
We report magnetic dichroism in photoemission using linearly polarized synchrotron radiation (XMLD) from the 3p core levels of the ferromagnetic metals $\chem{Fe}$ , $\chem{Co}$ , $\chem{Ni}$ , and their binary alloys, including $\chem{Cu}$ . Lineshape analysis reveals that the magnetic dichroism asymmetry in the spectral width, $W_{\ab{XMLD}}$ , tracks the changing magnitudes of the elemental magnetic moments. In contrast, the magnetic dichroism asymmetry peak-to-peak amplitudes, $A_{\ab{XMLD}}$ , monitor the overall saturation magnetization, which shows deviations from the Slater-Pauling curve due to changes in magnetic order, particularly at the Invar composition of $\chem{Fe_{65}Ni_{35}}$ .

PACS
71.20.Be - Transition metals and alloys.
75.25.+z - Spin arrangements in magnetically ordered materials (including neutron and spin-polarized electron studies, synchrotron-source x-ray scattering, etc.).
79.60.-i - Photoemission and photoelectron spectra.

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