Abstract
The spin-lattice relaxation rate of paramagnetic Fe 3+ in single-crystalline ZnO has been determined following low-fluence (Φ<10 12 cm -2) 60 keV implantation of 57Mn + (T 1/2=1.5 min) and emission Mössbauer spectroscopy on the 57Fe daughter nucleus in the temperature range from 300 to 664 K. The spin-lattice relaxation of Fe 3+ is found to follow a T 9 temperature dependence, in contrast to the T 2 dependence expected for a two-phonon Raman process determined in both single-crystal MgO and α-Al 2O 3 using the same analysis method of the Mössbauer spectra measured without an applied external magnetic field. This is an unexpected result since ZnO has a lower Debye temperature than both MgO and α-Al 2O 3.
Original language | English |
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Article number | 014006 |
Journal | Physica Scripta |
Issue number | T148 |
DOIs | |
Publication status | Published - Mar 2012 |