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首页> 外文期刊>Journal of Materials Science >Colossal dielectric, relaxor ferroelectric, diamagnetic and weak ferromagnetic properties of NdCrO3 perovskite nanoparticles
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Colossal dielectric, relaxor ferroelectric, diamagnetic and weak ferromagnetic properties of NdCrO3 perovskite nanoparticles

机译：Ndcro3钙钛矿纳米粒子的庞大电介质，弛豫铁电，抗磁性和弱铁磁性特性

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The NdCrO3 perovskite nanoparticles have been successfully synthesized using sol-gel auto-combustion process. Structural and morphological characterizations of the material have been performed at room temperature using XRD and SEM, respectively. Frequency- and temperature-dependent dielectric measurements have been performed in the range of 1Hz-10MHz and RT -300 degrees C, respectively. The dielectric constant is found to be in the order of epsilon>10(3) at room temperature, indicating the colossal dielectric constant behaviour. Ferroelectric phase transition temperature has increased with an increase in frequency, suggesting that the material is a relaxor ferroelectric nature. Temperature- and field-dependent magnetization measurements have been carried out in the temperature range (5-400K) and field up to 5T. M-T curve exhibited a diamagnetic-like behaviour in low temperature and low fields. Two magnetic transitions were found at T-N1 (223K) and T-N2 (33K) which correspond to para to weak ferromagnetic transition and Nd3+ spin ordering, respectively. Hysteresis loop noticed weak ferromagnetism.
机译：使用溶胶 - 凝胶自燃方法成功地合成了Ndcro3钙钛矿纳米颗粒。使用XRD和SEM分别在室温下进行材料的结构和形态学特性。频率和温度相关的电介质测量分别在1Hz-10MHz和RT -300摄氏度的范围内进行。发现介电常数在室温下按ε10（3）的顺序，表明巨大介电常数行为。铁电相转变温度随着频率的增加而增加，表明材料是松弛的铁电性质。在高达5T的温度范围（5-400K）和场中，在温度范围（5-400K）和场上进行了温度和现场依赖性磁化测量。 M-T曲线在低温和低场中表现出类似的抗磁性行为。在T-N1（223K）和T-N2（33K）处发现了两种磁性转变，其对应于弱铁磁性转变和ND3 +旋转排序。滞后回路注意到弱铁磁性。

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