Jahn-Teller assisted polaron hopping and associated dielectric response of PrFe0.5Mn0.5O2.95
| Autor: | Ramanathan Mahendiran, S. Kavita, Neetika Sharma, C. Ganeshraj, A. K. Das, P. N. Santhosh |
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| Jazyk: | angličtina |
| Rok vydání: | 2013 |
| Předmět: |
Polaron hopping
Variable range hopping Manganese Materials science Physics and Astronomy (miscellaneous) Condensed matter physics Jahn-Teller effect Jahn–Teller effect Polarons Antiferromagnets Low concentrations Thermal conduction Polaron Variable-range hopping Ion Maxwell-Wagner polarization Electrical resistivity and conductivity Small polaron hopping conductions Grain boundaries Antiferromagnetism Grain boundary Dielectric response Localized state |
| Zdroj: | IndraStra Global. |
| ISSN: | 2381-3652 |
| DOI: | 10.1063/1.4821190 |
| Popis: | The canted G-type antiferromagnet PrFe0.5Mn0.5O 2.95 shows an enhanced Jahn-Teller (JT) distortion below 150 K (T*). The resistivity of the grains can be described by variable range hopping between the localized states, and there is a dominant grain boundary contribution to dc resistivity, below T*. Above T*, the total dc resistivity follows small polaron hopping (SPH) conduction. A giant dielectric response is observed, and it can be ascribed to Maxwell-Wagner polarization and SPH mechanism. Despite the low concentration of JT active Mn3+ ions, our result indicates an important role of JT effect on physical properties of PrFe0.5Mn0.5O2.95. � 2013 AIP Publishing LLC. |
| Databáze: | OpenAIRE |
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