Local magnetic moments at Mn 2p X-ray photoelectron and Mn L_α,β X-ray emission spectra
Abstract
The Mn L_α,_β (3darrow 2p_3/2,1/2) resonant X-ray emission spectra (RXES) and Mn 2p_3/2,1/2 X-ray photoelectron spectra of proposed as half metallic ferromagnets Mn-based Heusler alloys Ni_2MnZ (Z=In, Sn, Sb) are found to be different from ones of La_1-xSm_xMn_2Si2 compounds. Linearly polarized resonant excitation establishes that the distinctive feature in Mn L_α RXES of Heusler alloys is due to the nearly half-metallic character of Mn 3d states [1]. For intermetallides with metallic like valence band the Mn L_α RXES behave as metallic. However, the magnitude of the Mn 2p_3/2 core level splitting follows the magnitude of local magnetic moment μ_Mn increasing from La_1-xSm_xMn_2Si2 (2.3-2.5 μ_B) to Heusler alloys (3-4 μ_B). In contrast to RXES and XPS data, Mn L_3,2 X-ray absorption spectra shows typically metallic behavior for all materials. [1] J. Kübler, et.al., Phys. Rev. B 28, 1745 (1983)
- Publication:
-
APS March Meeting Abstracts
- Pub Date:
- March 2004
- Bibcode:
- 2004APS..MAR.R1271Y