Magnetization reversal and exchange bias study in bulk Gd 1− x Y x CrO 3 ( x = 0.0–1.0)
| Autor: | S. Ravi, Bibhuti B. Dash |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
Materials science Condensed matter physics Rietveld refinement 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Electronic Optical and Magnetic Materials Ion Paramagnetism Magnetization Exchange bias Ferromagnetism 0103 physical sciences Antiferromagnetism 0210 nano-technology Néel temperature |
| Zdroj: | Journal of Magnetism and Magnetic Materials. 461:91-99 |
| ISSN: | 0304-8853 |
| Popis: | Single phase samples of Gd1−xYxCrO3 (x = 0.0–1.0) were prepared by sol-gel method. Lattice parameters obtained from the Rietveld refinement are found to decrease from a = 5.3129 A, b = 5.5210 A, and c = 7.6040 A for x = 0 to a = 5.2428 A, b = 5.5208 A and c = 7.5340 A for x = 1.0. The temperature variation of magnetization measurements show that all samples exhibit antiferromagnetic transitions and the Neel temperature (TN) decreases from TN = 174 K for x = 0.0 to 142 K for x = 1.0. Interesting magnetization reversal behavior is observed as the temperature is lowered from TN under field cooled condition and the magnetic compensation temperature, Tcomp is found to decrease from 136 K for x = 0 to 42 K for x = 0.70. These samples exhibit tunable positive and negative exchange bias fields with a maximum negative value of −1.17 kOe for x = 0.50. The origin of magnetization reversal and exchange bias field is explained by considering the competition between the paramagnetic moment of Gd3+ ions under the influence of negative internal field and the weak ferromagnetic component of Cr3+ ions due to canted antiferromagnetic ordering. |
| Databáze: | OpenAIRE |
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