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钇—镧石榴石型铁氧体系统的磁性和铁磁共振的研究

李国栋 翟清永 郭德全 李靖元

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钇—镧石榴石型铁氧体系统的磁性和铁磁共振的研究

李国栋, 翟清永, 郭德全, 李靖元

STUDY OF THE MAGNETIC PROPERTIES AND FERROMAGNETIC RESONANCE OF THE YTTRIUM-LANTHANUM IRON GARNET SYSTEM

LI GUO-DONG, ZHAI CHING-YONG, GUO DE-QUAN, LI JING-YUAN
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  • 本文对钇-镧石榴石型铁氧体系Y3(1-x)La3xFe5O12(其中x=0,0.05,0.10,O.20,0.30,0.50,0.75和1.00)的磁性和铁磁共振进行了研究。由X射线粉末照相分析和金相观察确定了石榴石转构的单相区域。测量了饱和磁矩σs、起始磁导率μ0、矫顽力Hc及有效g因子geff和共振线宽△H(3970和9160兆赫)与La含量x的关系。由磁性和铁磁共振的测量结果表明单相区城要比由X射线分析和金相观察的结果更窄一些。讨论了不同成分的σs的变化,μ0与磁化机构的关系。由geff与频率的关系计算出内场Hi和材料的内禀g因子。从磁的不均匀性的观点解释了实验上观测到的△H、Hi和Hc在一定成分范围内与x的指数式关系。
    The magnetic properties and Ferromagnetic resonance of the yttrium-lanthanum iron garnet system Y3(1-x)La3xFe5O12 were investigated at the compositions corresponding to x=0, 0.05, 0.10, 0.20, 0.30, 0.50, 0.75 and 1.00. The single-phase region with garnet structure determined by the X-ray powder pattern analysis and metallographic observations extends to about 0.10s, initial permeability μ0, coercive force Hc, effective g-factors geff and resonance line-width △H (at 3970 and 9160 Mc) were measured as a function of composition. The variation of σs with composition and the magnitude of μ0 as viewed from various magnetization mechanisms were discussed. From the frequency dependence of geff, the intrinsic g-factors and internal fields Hi of the materials were calculated. Exponential dependence of △H, Hi and Hc on x in certain composition region was observed experimentally and interpreted from the point of view of magnetic inhomogene-ities.
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  • 文章访问数:  7439
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出版历程
  • 收稿日期:  1962-06-21
  • 刊出日期:  2005-08-05

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