Resolution of the A- and B-site hyperfine fields of the spinel system Mg1+t
Fe2(1?t
) Ti
t
O4 in the spin-glass-like state |
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| Authors: | R M Persoons E De Grave P M A De Bakker R E Vandenberghe H H A Smit |
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| Institution: | (1) Laboratory of Magnetism, Gent State University, Proeftuinstraat 86, B-9000 Gent, Belgium;(2) Kamerlingh Onnes Laboratory, University of Leiden, Box 9506, NL-2300 RA Leiden, The Netherlands |
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| Abstract: | Spectra for three members of the spinel system Mg1+t
Fe2(1−t)Ti
t
O4, witht=0.5, 0.6 and 0.7, all showing re-entrant spin-glass-like behavior, were collected at temperatures down to 1.6 K and decomposed
in A- and B-site components, both having a broad distribution of hyperfine fields. The numerical results suggest a more pronounced
spin canting on A sites as compared to B sites. From spectra recorded at 4.2 K in an applied field of 6 T, and analysed with
a sum of two bi-dimensional distributions of hyperfine fields and canting angles, the existence of reversed A-site spins is
evidenced. The number of such spins increases with increasing magnetic dilution.
Senior Research Associate at the National Fund for Scientific Research, Belgium |
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| Keywords: | |
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