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Magnetism in FeNiW disordered alloys: Experiment and theory |
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| Authors: | Mitali Banerjee A.K. Majumdar Biplab Sanyal |
| Affiliation: | a Department of Materials Science, S.N. Bose National Center for Basic Sciences, JD Block, Sector III, Salt Lake City, Kolkata 700 098, India b Advanced Materials Research Unit, S.N. Bose National Center for Basic Sciences, JD Block, Sector III, Salt Lake City, Kolkata 700 098, India c Division of Materials Theory, Department of Physics and Astronomy, Uppsala University, Box 516, 75120 Uppsala, Sweden d Department of Condensed Matter Physics and Materials Science, Tata Institute of Fundamental Research, Colaba, Mumbai 400 005, India |
| Abstract: | We report here an experimental study of magnetization of FeNiW alloys at different compositions. We have studied variation of magnetization with temperature (at low external fields) and magnetic field (at low temperatures). The alloy shows para to ferromagnetic transitions across the composition range. We do not find any indication of the spin-glass phase. We have supplemented the experimental work with theoretical analysis using the first-principles tight-binding linear muffin-tin orbitals based augmented space recursion method. Our theoretical estimates of magnetic moment and Curie temperatures agree well with experiment. Our mean-field phase analysis also does not indicate the possibility of a spin-glass phase. |
| Keywords: | Alloy Phase transition Magnetization |
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