[Zurück]

C. F. Barbatti, R. Sato Turtelli, M. Schönhart, H. Sassik, J.P. Sinnecker, E.H.C.P. Sinnecker, R.S. Sarthour, A.P. Guimaraes, R. Grössinger:
"NMR, magnetic and structural study of Fe-Si-X (X = Nb, Ta) alloys";
Journal of Magnetism and Magnetic Materials, 290-291 (2005), S. 612 - 614.

NMR, magnetic and structural study of Fe-Si-X (X=Nb, Ta) alloys

C.F. Barbatti a, b, R. Sato Turtelli a, M. Schönhart a, H. Sassik a, J.P. Sinnecker c, E.H.C.P. Sinnecker b, R.S. Sarthour b, A.P. Guimarães b and R. Grössinger a

a Inst. für Festkörperphysik, TU Wien, Wiedner Hauptstrasse 8, A-1040, Vienna, Austria
b Centro Brasileiro de Pesquisas Físicas, R. Dr. Xavier Sigaud 150,22290-180, RJ, Brazil
c Instituto de Física, UFRJ, CP 68528, 21945-970 Rio de Janeiro, Brazil

Available online 14 December 2004.


Abstract

We investigated the structural and magnetic properties of the as-cast Fe_100-(x+y)Si_xNb_y (with 9.5<=x<=20 and 0.5<=y<=12) and Fe_78.5Si₂₀Ta_1.5 alloys by means of coercivity measurements and zero-field nuclear magnetic resonance (NMR) technique. The NMR spectra of these alloys present broad resonance lines at around 80 and 130 MHz. An increase in the local magnetic stiffness with increasing Nb content was found. These results are discussed based on previously reported results about the microstructure of the same specimen and coercivity measurements.

Keywords: NMR; Spin echo; Hyperfine fields-magnetic; Coercivity; Local environment effects

PACS: 75.50.Bb; 76.60-Lz; 75.60.Ej

http://aleph.ub.tuwien.ac.at/F?base=tuw01&func=find-c&ccl_term=AC05937882

http://dx.doi.org/10.1016/j.jmmm.2004.11.329