Irradiation-induced enhancement of Fe and Al magnetic polarizations in Fe60Al40 films

被引：1
|
作者：
Smekhova, A. [1 ,2 ]
Szyjka, Th [3 ,4 ]
La Torre, E. [3 ,4 ]
Ollefs, K. [3 ,4 ]
Eggert, B. [3 ,4 ]
Coester, B. [3 ,4 ]
Wilhelm, F. [5 ]
Bali, R. [6 ]
Lindner, J. [6 ]
Rogalev, A. [5 ]
Toebbens, D. [2 ]
Weschke, E. [2 ]
Luo, C. [2 ,7 ]
Chen, K. [2 ]
Radu, F. [2 ]
Schmitz-Antoniak, C. [1 ,8 ]
Wende, H. [3 ,4 ]
机构：
[1] Forschungszentrum Julich, Peter Grunberg Inst PGI 6, D-52425 Julich, Germany
[2] Helmholtz Zentrum Berlin Mat & Energie HZB, D-12489 Berlin, Germany
[3] Univ Duisburg Essen, Fac Phys, D-47048 Duisburg, Germany
[4] Univ Duisburg Essen, Ctr Nanointegrat Duisburg Essen CENIDE, D-47048 Duisburg, Germany
[5] European Synchrotron Radiat Facil ESRF, BP 220, F-38043 Grenoble 9, France
[6] Helmholtz Zentrum Dresden Rossendorf, Inst Ionenstrahlphys & Mat Forsch, D-01328 Dresden, Germany
[7] Tech Univ Munich, Inst Expt Phys Funct Spin Syst, D-85748 Garching, Germany
[8] TH Wildau Univ Appl Sci, Hsch Ring 1, D-15745 Wildau, Germany
来源：
NEW JOURNAL OF PHYSICS | 2024年 / 26卷 / 02期
关键词：
chemical disorder; ion-irradiation; XANES; XMCD; plasma treatment; X-RAY-ABSORPTION; CIRCULAR-DICHROISM; ELECTRON-YIELD; EDGE XANES; ALLOYS; CO; FERROMAGNETISM; MOSSBAUER; SPECTRA; METAL;
D O I：
10.1088/1367-2630/ad1497
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The rise of Fe magnetic moment, changes in Al electronic structure and a variation of Al magnetic polarization in thin films of transition metal aluminide Fe60Al40 have been probed through the order-disorder phase transition by soft x-ray absorption spectroscopy and x-ray resonant magnetic reflectivity in the extreme ultraviolet regime. In a course of the transition induced by 20 keV Ne+ irradiation with low fluences (similar to 10(14) ions cm(-2)), x-ray magnetic circular dichroism spectra taken at the Fe L-2,L-3 absorption edges at room and low temperatures revealed a pronounced increase of Fe 3d states spin-polarization. X-ray resonant magnetic reflectivity applied to the Al L-2,L-3 and Fe M-2,M-3 edges allowed to detect the magnetic polarization of Al atoms in the films. The changes in Al electronic structure have been seen by alteration of Al K edge x-ray absorption near edge structure. A difference in anisotropy fields for films before and after irradiation has been observed by element-specific hysteresis loops recorded at low temperatures in absorption and reflection geometries at the Fe L-2,L-3 and M-2,M-3 edges, respectively. An attempt to reduce the top oxide layer by an inductively coupled hydrogen plasma has shown a possibility to recover the chemically ordered phase.
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页数：15
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