Thermal stability and magnetic properties of partially Co-substituted (Fe71.2B24Y4.8)96Nb4 bulk metallic glasses
Thermal stability and magnetic properties of partially Co-substituted (Fe71.2B24Y4.8)96Nb4 bulk metallic glasses
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DOI：
10.1063/1.3549013
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发表时间：
2011-03
影响因子：
3.2
通讯作者：
M. Stoica;V. Kolesar;J. Bednarčic;S. Roth;H. Franz;J. Eckert
中科院分区：
文献类型：
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作者：
M. Stoica;V. Kolesar;J. Bednarčic;S. Roth;H. Franz;J. Eckert
研究了季元（Fe71.2B24Y4.8）96Nb4块体金属玻璃中Co部分取代Fe对其结构、热稳定性和磁性能的影响。结果表明，Co提高了合金的热稳定性，居里温度随Co含量的增加而单调升高。当x = 0.1时，饱和磁化强度最大，达到1.01 μB /磁性原子，随着Co含量的增加，饱和磁化强度呈线性下降。过冷液区延伸可达98 K，玻璃化转变温度接近熔化温度的2/3理论值。平均场理论允许计算磁交换刚度常数，并将其变化与磁饱和的变化联系起来。
The influence of partial replacement of Fe with Co in the quaternary (Fe71.2B24Y4.8)96Nb4 bulk metallic glasses on their structure, thermal stability and magnetic properties was studied. It was found that Co increases the thermal stability, as well as the Curie temperature, which monotonously increases as the Co content increases. The saturation magnetization shows a maximum of 1.01 μB per magnetic atom for x = 0.1, followed by a perfectly linear decrease for higher Co contents. The extension of the supercooled liquid region may reach even 98 K and the glass transition temperatures approach the theoretical value of 2/3 of the melting temperature. The mean field theory allows to calculate the magnetic exchange stiffness constant and to correlate its variation with the variation of the magnetic saturation.