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戴剑锋,刘鹏,王青,李维学.一维NiFe1.98RE0.02O4(RE=Pr, Nd, Sm)纳米丝的结构和磁性能[J].稀有金属材料与工程(英文),2019,48(5):1539~1543.[Dai Jianfeng,Liu Peng,Wang Qing and Li Weixue.Structure and magnetic properties of one-dimensional NiFe1.98RE0.02O4(RE=Pr, Nd, Sm)ferrite nanowires[J].Rare Metal Materials and Engineering,2019,48(5):1539~1543.]
Structure and magnetic properties of one-dimensional NiFe1.98RE0.02O4(RE=Pr, Nd, Sm)ferrite nanowires
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Received:October 18, 2017  Revised:December 08, 2017
DOI:
Key words: Nicker ferrite  rare earth substituted  electrospinning  nanowires  magnetic properties
Foundation item:国家自然科学基金资助(项目号11664023)
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Dai Jianfeng,Liu Peng,Wang Qing and Li Weixue  
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Abstract:
      The one-dimensional NiFe1.98RE0.02O4 (RE=Pr, Nd, Sm) nanowires have been fabricated by using sol-gel method, electrospinning technique and heat treatment technology. The structure, morphology and magnetic properties of NiFe1.98RE0.02O4 (RE=Pr, Nd, Sm) nanowires are characterized by X ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM) and vibrating sample magnetometer (VSM). The result shows that the nanowires surface is smooth and the diameter of the nanowires is about 60 nm which is continuous and symmetrical. All samples present a pure phase spinel structure. Doping Pr3+, Nd3+ and Sm3+ respectively lower the crystallinity of NiFe2O4, and the grain size D decreases from 44.8 nm to 33.8 nm. NiFe1.98RE0.02O4 (RE=Pr, Nd, Sm) nanowires exhibit soft ferrimagnetic behavior. The saturation magnetization (Ms) of NiFe1.98RE0.02O4 (RE=Pr, Nd, Sm) nanowires are 39.58 emu·g-1, 41.10 emu·g-1, 34.23 emu·g-1; and the coercivity (Hc) of the nanowires are 176.49 Oe, 170.98 Oe, 199.22 Oe, respectively. Among them, the soft magnetic properties with the largest Ms (41.10 emu·g-1) and the smallest Hc (170.98 Oe) of NiFe1.98Nd0.02O4 nanowires is the best.