Chemical Research in Chinese Universities ›› 2017, Vol. 33 ›› Issue (6): 869-875.doi: 10.1007/s40242-017-7069-y

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Nd3-xAExFe5O12:Hydrothermal Synthesis, Structure and Magnetic Properties

WU Jie1, YUAN Long1, WANG Shan2, HOU Changmin1   

  1. 1. State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China;
    2. Department of Materials Science and Engineering, Jilin Institute of Chemical Technology, Jilin 132022, P. R. China
  • Received:2017-02-27 Revised:2017-07-12 Online:2017-12-01 Published:2017-08-21
  • Contact: HOU Changmin,E-mail:houcm@jlu.edu.cn E-mail:houcm@jlu.edu.cn
  • Supported by:
    Supported by the "Twelfth Five Year" Project(No.2015-466) and the "Thirteenth Five Year" Project(No.JJKH20170217KJ) of the Science and Technology Research in the Education Department of Jilin Province, China and the Natural Science Fund of Jilin Provincial Science & Technology Department, China(No.20160101326JC).

Abstract: Rare-earth ferrite garnet is one of the most important materials applied in microwave transducer and infrared magneto-optical devices, etc. Nd3?xAExFe5O12(AE=Ca, Sr) crystals, which have cubic structure with the space group of Ia3d and lattice constants over 1.26 nm, were prepared via the mild hydrothermal method. The structural, morhpology and magnetic properties were characterized by means of powder X-ray diffraction, scanning electronic microscopy, as well as vibrating sample magnetometer and Mössbauer spectroscopy, respectively. Mössbauer spectroscopy demonstrates the coexistence of Sr2+, Ca2+ and Nd3+ at the C sites of the dodecahedrons for different substituted garnets. The crystal shape is dodecahedron, and the particle sizes are decreased with increasing the Ca and Sr doping concentrations. By recording the magnetic hysteresis loops and M-T curves at different temperatures, it can be seen that with the increasing x, the saturation magnetization values decrease while the coercive forces increase under the condition of high temperatures.

Key words: Garnet structure, Magnetic property, Mössbauer spectrum