HU Fengxia State Key Laboratory of Magnetism
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Institute of Physics
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Academia Sinica
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Beijing
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ChinaCHEN Jinchang Beijing Teacher's College
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Beijing
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ChinaSHEN Baogen GUO Huiqun State Key Laboratory of Magnetism
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Institute of Physics
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Academia Sinica
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Beijing
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China
金属学报(英文版)
Curie temperature of amorphous alloys Co_(90-x)Cr_x Zr_(10) decreases linearly with increas- ing x.Average magnetic moment per magnetic atom Co or Cr is 1.51 μB or -3.62 μB respectively.The temperature dependence of spontaneous magnetization at low temper- atures is in agreement with Bloch's T~(3/2) law.The spin wave stiffness constant decreases with increasing x from 4 to 20.The range of interaction is 2—3 atoms for x=4 and nearest neighbour atom for x=20.The crystallization temperature increases mono- tonically with increasing x.It may relate to the average number of outer electrons per atom.The crystalline phase components of heat-treated alloys were analyzed by X-ray diffration and thermomagnetic measurement.
关键词:
amorphous state
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null
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null
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null
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null
胡凤霞
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陈金昌
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沈保根
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郭慧群
金属学报
本文研究了非晶态Co_(90-x)Cr_xZr_(10)(0≤x≤25)合金的磁性,得到样品的Curie温度T_C和每个磁性原子的有效磁矩μ均随Cr含量x的增加近似线性下降,计算出每个Co和Cr原子的平均磁矩分别为μ_(Co)=1.51μ_B和μ_(Cr)=-3.62μ_B低温下的磁化强度与温度的关系符合Bloch的T~(3/2)定律,由此算出的自旋波劲度系数D从x=4时的D=2.788meVnm~2下降到x=20时的D=0.727meVnm~2,相互作用范围从x=4时的2—3个原子减小到x=20时的最近邻原子之间,样品的晶化温度随Cr含量x的增加单调上升,认为与合金的平均外层电子浓度有关,用X射线衍射和热磁测量分析了热处理样品的结晶相。
关键词:
非晶态
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magnetic properties
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crystallization
朱立群
材料研究学报
从强碱性溶液体系不同含Mo 量的溶液中以及不同电沉积工艺条件下,可以获得非晶态或晶态Fe-Mo 合金镀层。这种镀液稳定、工艺简单,镀液中允许Fe~(2+)离子浓度范围宽。获取非晶态Fe-Mo 合金的条件是:保持镀层中含Mo 量在20wt-%以上。要达到此条件就必须保持镀液中的(Mo)/(Fe+Mo)×100量在66%以上,镀液温度在20—45℃范围内,Fe-Mo 合金镀层才成为非晶态。反之,当镀液温度超过55℃,镀层将转变成为晶态。
关键词:
非晶态
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electrodeposition
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Fe-Mo alloy
