The Surface and Bulk Magnetic Properties of Fe-Al Alloys

0435396 - ÚFM 2015 RIV PL eng J - Journal Article
Hendrych, A. - Žitovsky, O. - Jirásková, Yvonna - Matko, I.
The Surface and Bulk Magnetic Properties of Fe-Al Alloys.
Acta Physica Polonica A. Roč. 126, č. 1 (2014), s. 58-59. ISSN 0587-4246. E-ISSN 1898-794X.
[CSMAG Czech and Slovak Conference on Magnetism /15./. Košice, 17.06.2013-21.06.2013]
R&D Projects: GA MŠMT 7AMB12SK009
Institutional support: RVO:68081723
Keywords : Fe-Al * MOKE * Surface properties * MFM
Subject RIV: BM - Solid Matter Physics ; Magnetism
Impact factor: 0.530, year: 2014

The present paper is devoted to Fe-Al alloys with aluminium content of 28, 33 and 35 at.%, prepared by standard technological procedure. The attention is focused on the comparison of the surface and bulk magnetic properties, which were obtained by magneto-optical Kerr e ect (MOKE) and atomic and magnetic force microscopy (AFM/MFM) as the surface-sensitive methods combined with the vibration sample magnetometer (VSM) yielding the bulk magnetic properties. As was expected, the Fe72Al28 sample shows an overall ferromagnetic behavior at room temperature. Nevertheless, the bulk hysteresis loop shows single-phase behavior, while the surface MOKE hysteresis loop consists of two overlapped curves characterized by di erent coercivity values. The other two samples are paramagnetic from the viewpoint of the bulk, but reveal ferromagnetic behavior of their surfaces, represented by hysteresis loops, corresponding to rather harder magnetic phase. These results are well supported by MFM.
Permanent Link: http://hdl.handle.net/11104/0239319