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| Field | Value |
| Title | Effects of A-site ionic size variation on the magnetic and transport properties of (PrxSm1-x)(2/3)Sr1/3MnO3 (0 <= x <= 1) |
| Names |
ASTHANA, S
(author) DHO, J (author) BAHADUR, D (author) |
| Date Issued | 2007 (iso8601) |
| Abstract | The effects of average A-site ionic size on magnetic and transport properties have been studied in (PrxSm1-x)(2/3)Sr1/3MnO3 (0 <= x <= 1) manganites with fixed carrier concentration. An effect of average Asite ionic radius (< rA >) with the Pr substitution has been clearly observed in the continuous changes of ferromagnetic transition temperature and metal-insulator transition temperature. The change of the resistivity with the x was explained by a variation in the hopping integral between Mn3+ and Mn4+, which is dependent on the Mn-O-Mn bond angle affected by the average A-site ionic size. Remarkably, the Smdoped manganites showed an antiferromagnetic transition by the rare-earth moments below 50 K as well as the ferromagnetic transition by Mn moments at a higher temperature. A phase diagram of (PrxSm1-x)(2/3)Sr1/3MnO3 (0 <= x <= 1) was successfully constructed on the basis of magnetic and transport studies. |
| Genre | Article; Proceedings Paper |
| Topic | resistivity |
| Identifier | 0370-1972 |
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