Electrical resistivity, thermoelectric power and electron spin resonance studies on Pr(1−x)SrxMnO3 (x=0.2, 0.26 and 0.3)
| Autor: | M. S. Ramachandra Rao, V. Sankaranarayan, N. Rama |
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| Rok vydání: | 2008 |
| Předmět: |
Condensed matter physics
Chemistry Mechanical Engineering Metals and Alloys Resonance Manganite law.invention Paramagnetism Ferromagnetism Electrical resistance and conductance Mechanics of Materials Electrical resistivity and conductivity law Seebeck coefficient Materials Chemistry Electric resistance Paramagnetic resonance Spin dynamics Thermoelectric power Electrical resistivities Electron paramagnetic resonance Electron spin resonance Electron spin resonance measurements Magnetically ordered materials Temperature variations Thermopower Electrons |
| Zdroj: | Journal of Alloys and Compounds. 466:12-16 |
| ISSN: | 0925-8388 |
| DOI: | 10.1016/j.jallcom.2007.11.046 |
| Popis: | Temperature variation of electrical resistivity, thermopower and electron spin resonance measurements have been carried out in Pr (1-x)SrxMnO3 (x = 0.2, 0.26 and 0.3) in order to study the influence of carrier concentration on the formation of spin clusters in the paramagnetic state. Activation energies obtained from resistivity and thermopower was seen to behave in the opposite trend to that obtained from ESR linewidth and intensity with respect to variation in 'x', the carrier concentration, implying that the origin of these energies are different from each other. It is seen that spin clusters exist in the paramagnetic state even in a ferromagnetic insulating composition namely x = 0.2, where the double exchange strength is the weakest. � 2007 Elsevier B.V. All rights reserved. |
| Databáze: | OpenAIRE |
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