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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Affiliation: | (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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