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Magnetic properties of superparamagnetic β-NaFeO 2 nanoparticles
Journal of Magnetism and Magnetic Materials ( IF 2.7 ) Pub Date : 2018-07-01 , DOI: 10.1016/j.jmmm.2018.03.004 Sarbjit Singh , Alexandr Tovstolytkin , Gurmeet Singh Lotey
Journal of Magnetism and Magnetic Materials ( IF 2.7 ) Pub Date : 2018-07-01 , DOI: 10.1016/j.jmmm.2018.03.004 Sarbjit Singh , Alexandr Tovstolytkin , Gurmeet Singh Lotey
Abstract Superparamagnetic β-NaFeO2 nanoparticles of particle size 37 nm with orthorhombic crystal structure and space group Pn21a have been prepared by sol-gel method. Temperature dependent magnetic study has been performed. Its systematic analysis has been done to calculate the Curie and blocking temperatures along with its magnetic susceptibility. The Langevin fitting of the magnetic data has been carried out. It has been shown that the synthesized nanoparticles exhibit superparamagnetic behavior. The Neel’s relaxation time has been calculated to further support its superparamagnetic nature. The synthesized β-NaFeO2 nanoparticles behave like ferromagnets below 80 K; they are superparamagnetic above 80 K–340 K and thereafter as paramagnetic. The possible mechanism of superparamagnetism has been discussed. It has been concluded that these nanoparticles can find wide applications in the area of biomedical sciences.
中文翻译:
超顺磁性 β-NaFeO 2 纳米粒子的磁性
摘要 采用溶胶-凝胶法制备了粒径为37 nm、正交晶体结构、空间群为Pn21a的超顺磁性β-NaFeO2纳米粒子。已进行温度相关磁性研究。已经对其进行了系统分析,以计算居里温度和阻塞温度及其磁化率。已进行磁数据的朗之万拟合。已经表明合成的纳米颗粒表现出超顺磁性。Neel 的弛豫时间经过计算以进一步支持其超顺磁性。合成的 β-NaFeO2 纳米粒子在 80 K 以下表现得像铁磁体;它们在 80 K-340 K 以上是超顺磁性的,然后是顺磁性的。已经讨论了超顺磁性的可能机制。
更新日期:2018-07-01
中文翻译:
超顺磁性 β-NaFeO 2 纳米粒子的磁性
摘要 采用溶胶-凝胶法制备了粒径为37 nm、正交晶体结构、空间群为Pn21a的超顺磁性β-NaFeO2纳米粒子。已进行温度相关磁性研究。已经对其进行了系统分析,以计算居里温度和阻塞温度及其磁化率。已进行磁数据的朗之万拟合。已经表明合成的纳米颗粒表现出超顺磁性。Neel 的弛豫时间经过计算以进一步支持其超顺磁性。合成的 β-NaFeO2 纳米粒子在 80 K 以下表现得像铁磁体;它们在 80 K-340 K 以上是超顺磁性的,然后是顺磁性的。已经讨论了超顺磁性的可能机制。