| Αρχική Σελίδα > Local increase of the Curie temperature in Mn/Fe implanted Y$_{3}$Fe$_{5}$O$_{12}$ (YIG) |
| Published Articles | |
| Title | Local increase of the Curie temperature in Mn/Fe implanted Y$_{3}$Fe$_{5}$O$_{12}$ (YIG) |
| Author(s) | Krastev, P B (Sofiya, Inst. Nucl. Res.) ; Gunnlaugsson, H P (Iceland U.) ; Nomura, K (Tokyo Metropolitan U.) ; Bharuth-Ram, K (DUT, Durban ; KwaZulu Natal U.) ; Qi, B (Iceland U.) ; Masenda, H (Witwatersrand U.) ; Mølholt, T E (Roskilde U., IMFUFA ; CERN) ; Naidoo, D (Witwatersrand U.) ; Ólafsson, S (Iceland U.) ; Tarazaga Martín-Luengo, A (Linz U.) ; Unzueta, I (U. Basque Country, Leioa) ; Johnston, K (CERN) ; Schell, J (CERN ; Duisburg-Essen U.) ; Gislason, H P (Iceland U.) |
| Publication | 2020 |
| In: | Appl. Radiat. Isot. 160 (2020) 109121 |
| DOI | 10.1016/j.apradiso.2020.109121 |
| Abstract | The change in the Curie temperature of single crystalline garnet Y$_{3}$Fe$_{5}$O$_{12}$ (YIG) sample due to lattice damage induced by ion implantation has been investigated in $^{57}$Fe emission Mössbauer Spectroscopy (eMS) following implantation of $^{57}$Mn (T½=1.5 min). The Mössbauer spectra analysis reveal high spin Fe $^{3+}$ ions substituted on both the octahedral and the tetrahedral sites. Measurements in the temperature range 298 K–798 K show that average values of the magnetic hyperfine field are decreased by the implantation-induced damage on the local lattice structure of the YIG. The Curie temperature, however, is determined to be 651 ± 5 K, considerably higher than the value of bulk YIG (559 K). This is most likely due to lattice damage-induced changes on the spin configurations of YIG through a Fe$_{A}$-O-Fe$_{D}$ distortion scheme. |
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