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Magnetic ordering above room temperature in the sigma-phase of Fe66V34 |
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| Authors: | Jakub Cie?lak Stanis?aw M Dubiel Michael Reissner |
| Institution: | a Faculty of Physics and Computer Science, AGH University of Science and Technology, 30-059 Kraków, Poland b CEMDRX Department of Physics, University of Coimbra, 3000-516 Coimbra, Portugal c Institute of Solid State Physics, Vienna University of Technology, 1040 Wien, Austria |
| Abstract: | Magnetic properties of four sigma-phase Fe100−xVx samples with 34.4?x?55.1 were investigated by Mössbauer spectroscopy and magnetic measurements in the temperature interval 4.2-300 K. Four magnetic quantities, viz. hyperfine field, Curie temperature, magnetic moment and susceptibility, were determined. The sample containing 34.4 at% V was revealed to exhibit the largest values found up to now for the sigma-phase for average hyperfine field, 〈B〉=12.1 T, average magnetic moment per Fe atom, 〈μ〉=0.89 μB, and Curie temperature, TC=315.3 K. The quantities were shown to be strongly correlated with each other. In particular, TC is linearly correlated with 〈μ〉 with a slope of 406.5 K/μB, as well as 〈B〉 is so correlated with 〈μ〉, yielding 14.3 T/μB for the hyperfine coupling constant. |
| Keywords: | 75 30 Cr 75 50 Bb 76 80 +y 77 80 Bh |
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