Structural, Electrical Properties and Magnetoresistive Effect in the (La1-xDyx)0.67Sr0.33MnO3 Compound
| Autor: | A. Huda, S. A. Halim, I. Priscilla, Z.A. Talib, Kean Pah Lim, O.J. Lee |
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| Rok vydání: | 2006 |
| Předmět: |
Colossal magnetoresistance
Materials science Magnetoresistance Condensed matter physics Mechanical Engineering Transition temperature Analytical chemistry Condensed Matter Physics Microstructure Magnetic field Mechanics of Materials Electrical resistivity and conductivity General Materials Science Diffractometer Perovskite (structure) |
| Zdroj: | Materials Science Forum. 517:93-96 |
| ISSN: | 1662-9752 |
| Popis: | The significant influences of substituting low concentration Dy at La- site for La0.667Sr0.333MnO3 perovskites compounds in structural, electrical and magnetoresistance properties have been studied. The polycrystalline samples (La1-xDyx)0.667Sr0.333MnO3 with x= 0.00, 0.02 and 0.10 were synthesized via conventional solid-state reaction in bulk. This work measured their resistivity properties with (below 1 Tesla) and without the presence of magnetic field (0 Tesla) as a function of temperature, microstructure and particle distribution and structural distortion using four point probe resistivity technique, X- ray diffractometer (XRD) and Atomic Force Microscope (AFM). The resistivity in applied magnetic field or so-called magnetoresistance ratio is defined as MR% = (Ro – RH)/RH x 100 was measured at 90K, 100K, 150K, 200K, 250K, 270K and 300K. The highest MR% values for x=0.00, 0.02 and 0.10 are 15.3%, 15.5% and 20.6% at 1 Tesla respectively. The metal- insulator transition temperature, TMIT correspond to >300K, 298K and 230K of sample with x= 0.00, 0.02 and 0.10 respectively were observed from resistivitytemperature (R-T) curve. |
| Databáze: | OpenAIRE |
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