Observation of Unusual Magnetic Phase in a Polycrystalline Half Doped Manganite by EPR Spectroscopy
| Autor: | Soumik Mukhopadhyay, Vinay Kumar Shukla |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Materials science Condensed matter physics Transition temperature Doping Resonance 02 engineering and technology 021001 nanoscience & nanotechnology Manganite 01 natural sciences law.invention Condensed Matter::Materials Science Paramagnetism Charge ordering law 0103 physical sciences Condensed Matter::Strongly Correlated Electrons 0210 nano-technology Spectroscopy Electron paramagnetic resonance |
| Zdroj: | Materials Today: Proceedings. 21:2030-2034 |
| ISSN: | 2214-7853 |
| DOI: | 10.1016/j.matpr.2020.01.320 |
| Popis: | In this work, we investigated the magnetic properties of the polycrystalline Pr1-xCaxMnO3 near half doping by using the Electron Paramagnetic Resonance (EPR) spectroscopy. We observed the evidence of magnetically ordered rare regions above the anti-ferromagnetic ordering temperature (TN) which persist up to “a temperature scale” T*, higher than the charge ordering transition temperature TCO. The major EPR resonance signal arising due to the combined effect of Mn3+ and Mn4+ spins, indicate the emergence of additional sub-peaks above TN. The opposite temperature dependence of resonance fields associated with these sub-peaks suggests the formation of anti-ferromagnetically ordered clusters within the paramagnetic background for T |
| Databáze: | OpenAIRE |
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