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中国物理学会期刊

Tb0.3Dy0.7(Fe1-xAlx)1.95合金的自旋重取向和穆斯堡尔

CSTR: 32037.14.aps.54.944

Spin reorientation and M?ssbauer effect studies on Tb0.3Dy0.7(Fe1-xAlx)1.95 alloys

CSTR: 32037.14.aps.54.944
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  • 系统研究了室温和77K温度时Tb03Dy07(Fe1-xAlx)195(x=0,005,01,015,02,025,03,035)合金中金属Al替代Fe对自旋重取向和穆斯堡尔谱的影响. 结果发现,Tb03Dy07(Fe1-xAlx)195合金的易磁化方向随成分和温度在110面逐渐偏离了立方晶体的主对称轴,即自旋重取向. 室温下,当x=015时,Tb03Dy07(Fe1-xAlx)195合金中出现了少量非磁性相;x>015时,合金完全呈顺磁性;而77K温度下,x=02时合金仍然呈磁性相. 在室温和77K温度时,超精细场Hhf均随Al元素的增加而减小,而同质异能移IS随Al元素的增加而增加,四极劈裂QS随Al含量呈无规律的变化.

     

    The effect of Al substitution for Fe on the spin reorientation and Mssbauer spectra of a series of Tb03Dy07(Fe1-xAlx)195 alloys (x=005,01,015,020,025,030,035) at room temperature and 77K has been investigated systematically. The results indicate that the easy magnetization direction in the 100 plane deviates slightly from the main axis of symmetry, namely spin rerioentation. A small amount of non_magnetic phase exists for x=015, and the alloys become paramagnetism when x>015 at room temperture, but at 77K the alloys still remain to be magnetic phase even at x=02. At room temperature and 77K, the hyperfine field decreases and the isomer shift increases with increasing concentration of Al, and the quaduple splitting QS shows weak concentration dependence.

     

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