Magnetic properties and hydrostatic pressure effect on the curie temperature of (Co,Mn)2B amorphous alloys |
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| Authors: | K Shirakawa T Kaneko T Masumoto |
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| Institution: | The Research Institute of Electric and Magnetic Alloys, Yagiyama Sendai 982, Japan;The Research Institute for Iron, Steel and Other Metals, Tohoku University, Sendai 980, Japan |
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| Abstract: | The temperature dependence of magnetization and magnetic susceptibility and hydrostatic pressure effect on the Surie temperature (dTc/dP) are measured for (Co1-xMnx)2B (0?x?0.4) amorphous alloys and the results are compared with those of crystalline compounds with the same composition. The Curie temperature decreases linearly with an increasing Mn content but magnetization shows a maximum around x=0.15. The reciprocal magnetic susceptibility of all the prepared alloys obeys the Curie-Weiss law above Tc. The magnitude of the negative value of dTc/dP decreases linearly with increasing x from about 1.1 K/kbar (x=0) to zero (x=0.4), the composition dependence of which is opposite to that of the crystalline compound. The composition dependence of the average magnetic moment per transition metal atom and the Curie temperature and dTc/dP are analysed on the basis of the local environment and the pair order interaction mode, respectively. |
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