Mössbauer hyperfine spectra of DyCo2Si2 |
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| Authors: | L Asch M Bogé J Chappert J Gal E A Görlich G M Kalvius |
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| Institution: | (1) CEN, DRF-LIH, 85X, F-3S041 Grenoble Cadex, France;(2) Physik-Department E 15, T.U. München, D-8046 Garching, FRG;(3) Nuclear Research Center-Negev, POB 9001, Beer Sheva, Israel;(4) Institute of Physics, Jagellonian University, Cracow, Poland |
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| Abstract: | Mössbauer spectra of161Dy in DyCo2 Si2 were taken between 4.2K and 78K. The tetragonal intermetallic has a Neel temperature of TN=21K. Up to 25K spectra are characterized by extremely slow electronic relaxation, precluding the usual collapse of hyperfine splitting on approaching TN. Between TN and 78K relaxation spectra are seen. The most unusual feature is a slow, steady decrease of Bhf and e2qQ with temperature. It is suggested that this arises from changes in the wave function of the electronic ground state by influences of the molecular and the crystalline electric fields. |
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