Magnetic properties of La(FexAl1-x)13 determined via neutron scattering and Mössbauer spectroscopy.
Magnetic properties of La(FexAl1-x)13 determined via neutron scattering and Mössbauer spectroscopy.
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DOI：
10.1103/physrevb.34.169
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发表时间：
1986-07
期刊：
影响因子：
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通讯作者：
R. Helmholdt;Thomas Palstra;G. Nieuwenhuys;J. Mydosh;A. M. Kraan;K. Buschow
中科院分区：
文献类型：
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作者：
R. Helmholdt;Thomas Palstra;G. Nieuwenhuys;J. Mydosh;A. M. Kraan;K. Buschow
利用中子衍射和穆斯堡尔光谱研究了稳定度为0.46<x <0.92的La(FexAl1-x)13伪二元金属间化合物。对一个反铁磁x =0.91样品在4.2 K下的中子测量显示了一个由铁磁团簇组成的长阶反铁磁态。mossbauer效应测量表明，在铁磁-反铁磁相界x ~=0.88处，Fe核处的超精细场有所下降。这两个微观测量都表明，由于铁原子的极高配位，从α-铁类铁磁性转变为γ-铁类反铁磁性。
La(FexAl1–x)13 pseudobinary intermetallic compounds, which can be stabilized for 0.46<x <0.92, have been studied by neutron diffraction and Mossbauer spectroscopy. Neutron measurements on an antiferromagnetic x =0.91 sample at 4.2 K reveal a long-range-order antiferromagnetic state, consisting of ferromagnetic clusters, coupled antiferromagnetically. Mossbauer-effect measurements show a drop of the hyperfine field at the Fe nucleus at the ferromagnetic-antiferromagnetic phase boundary x ~=0.88. Both these microscopic measurements indicate a transition from α-iron-like ferromagnetism to γ-iron-like antiferromagnetism due to the extremely high coordination of Fe atoms.