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应用科学学报 ›› 1989, Vol. 7 ›› Issue (4): 327-332.

• 论文 • 上一篇    下一篇

Y-GdIG系单晶铁氧体的磁性、铁磁共振和穆斯堡尔效应研究

李德新1, 郭淑娇1, 李国栋1, 张药西2, 藤流礼2, 严勇3   

  1. 1. 中国科学院物理研究所;
    2. 北京第三无线电厂;
    3. 中国科学院高能物理研究所
  • 收稿日期:1987-10-10 修回日期:1988-06-16 出版日期:1989-12-31 发布日期:1989-12-31

THE MAGNETIC PROPERTIES, FERROMAGNETICRESONANCE AND MOSSBAUER EFFECT OF Y-GdIG SINGLE CRYSTAL SYSTEM

LI DEXIN1, GUO SHUJIAO1, LI GUODONG1, ZHANG YAOXI2, TENG YULI2, YAN YONG3   

  1. 1. Institute of Physics, Academia Sinica;
    2. Beijing Third Radio Appliance Factory;
    3. Beijing High Energy Physics Institute, Academia Sinica
  • Received:1987-10-10 Revised:1988-06-16 Online:1989-12-31 Published:1989-12-31

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摘要： 本文在较宽温度范围内系统地研究了Y3-xGdxFe5O12单晶体的饱和磁矩、铁磁共振和穆斯堡尔效应谱随成分和温度的变化,用亚铁磁理论解释了不同成分的热磁曲线及抵消点的变化,理论计算和实验结果符合较好.比较了几种铁磁共振线宽理论的计算结果,发现以亚铁磁共振理论加以适当条件后与实验结果较符合;发现Y3+和Gd3+在十二面体晶位中的代换,对四面体和八面体晶位中的Fe3+的穆斯堡尔谱参量无明显影响;观测到代表四面体和八面体晶位中Fe3+的谱线在磁有序区又再分成两组亚谱.

Abstract: The dependence of the saturation magnetic moment, ferromagnetic resonance (FMR) and Mössbauer effect on the composition and temperature for the Y3-xGdxFe5O12 single crystal system with x=0, 0.5, 1.0, 1.5, 2.0, 2.5, and 3.0 have been studied at a wide range of temperature. The variations of thermo-magnetic curves and compansation points with composition are explained by the theory of ferrimagnetism. The theoretically calculated results agree well with those of experiments. The line-widths of FMR for several theories are evaluated. It is found that the experimental results can be well explained by the phenome-nological theory of ferrimagnetic resonance with some reasonable assumptions. It is also tcund that the substitution of Gd3+ for Y3+ ions in the dodecahedral site has hardly any significant influence on the Mössbouer parameters of Fe3+ ions in the tetrahedral and octahedral sites, whose spectra can be resolved into two subspectra again.