Magnetic transition behavior of perovskite manganites Nd_(0.5)Sr_(0.3)Ca_(0.2)MnO_3 polycrystalline |
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| Affiliation: | 1.Department of Physics, Baotou Normal University, Baotou 014030, China;2.Inner Mongolia Key Laboratory of Magnetism and Magnetic Materials, Baotou 014030, China |
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| Abstract: | A polycrystalline sample Nd0.5Sr0.3Ca0.2MnO3 is prepared by the conventional solid state reaction method. The structure and magnetic properties are investigated with x-ray diffraction (XRD) patterns, a superconducting quantum interference device (SQUID), and electron spin resonance (ESR). The sample is in single phase with the space group Pbnm symmetry. With the decrease of temperature, Nd0.5Sr0.3Ca0.2MnO3 undergoes three magnetic transitions: ferromagnetic transition at TC ≈ 210 K, charge-ordering at TCO ≈ 175 K, and antiferromagnetic transition at TN=155 K. In addition, the activation energy Ea ≈ 52.78 meV can be extracted by curve fitting. |
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| Keywords: | magnetic transition electron spin resonance activation energy |
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