Comparative Mossbauer and magnetization study of 1% (119)Sn-doped La(0.67)Ca(0.33)MnO(3) and La(0.67)Sr(0.33)MnO(3)
| dc.contributor.author | Assaridis, E. | en |
| dc.contributor.author | Panagiotopoulos, I. | en |
| dc.contributor.author | Moukarika, A. | en |
| dc.contributor.author | Bakas, T. | en |
| dc.date.accessioned | 2015-11-24T18:31:33Z | |
| dc.date.available | 2015-11-24T18:31:33Z | |
| dc.identifier.issn | 1098-0121 | - |
| dc.identifier.uri | https://olympias.lib.uoi.gr/jspui/handle/123456789/16489 | |
| dc.rights | Default Licence | - |
| dc.subject | phase-separation | en |
| dc.subject | ferromagnetic manganites | en |
| dc.subject | manganese perovskites | en |
| dc.subject | doped manganites | en |
| dc.subject | transition | en |
| dc.subject | magnetoresistance | en |
| dc.subject | la1-xcaxmno3 | en |
| dc.subject | dependence | en |
| dc.subject | dynamics | en |
| dc.subject | physics | en |
| dc.title | Comparative Mossbauer and magnetization study of 1% (119)Sn-doped La(0.67)Ca(0.33)MnO(3) and La(0.67)Sr(0.33)MnO(3) | en |
| heal.abstract | A detailed comparative Mossbauer study of La(0.67)Ca(0.33)MnO(3) and La(0.67)Sr(0.33)MnO(3) samples doped with 1% Sn is presented. The spectra at 5 K can be analyzed by a single ferromagnetic component. However, at higher temperatures two separate ferromagnetic components and a paramagnetic one are required to fit the spectra. The ferromagnetic component with the lower hyperfine field is attributed to clusters of weakened double-exchange interactions due to competition by localization mechanisms. Clear differences between the two samples in regard to the critical behavior arise: (i) The hyperfine field of La(0.67)Ca(0.33)Mn(0.99)Sn(0.01)O(3) disappears abruptly at T(c) in contrast to that of La(0.67)Sr(0.33)Mn(0.99)Sn(0.01)O(3) which varies continuously and goes to zero smoothly at the critical temperature. (ii) The second ferromagnetic phase appears above 0.35T(c) in the Ca sample but only above 0.83T(c) in the Sr sample. The paramagnetic component appears for T > 0.67T(c) in the former compared to T > 0.9T(c) in the latter. The results support recent studies that show differences in the polaronic character, and critical behavior thereof, between the two materials. | en |
| heal.access | campus | - |
| heal.fullTextAvailability | TRUE | - |
| heal.identifier.primary | Doi 10.1103/Physrevb.75.224412 | - |
| heal.identifier.secondary | <Go to ISI>://000247624800059 | - |
| heal.identifier.secondary | http://prb.aps.org/abstract/PRB/v75/i22/e224412 | - |
| heal.journalName | Physical Review B | en |
| heal.journalType | peer reviewed | - |
| heal.language | en | - |
| heal.publicationDate | 2007 | - |
| heal.recordProvider | Πανεπιστήμιο Ιωαννίνων. Σχολή Επιστημών και Τεχνολογιών. Τμήμα Βιολογικών Εφαρμογών και Τεχνολογιών | el |
| heal.type | journalArticle | - |
| heal.type.el | Άρθρο Περιοδικού | el |
| heal.type.en | Journal article | en |
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