Magnetic phase transitions in (Fe1−xTx)3Ga4 alloys
Magnetic phase transitions in (Fe1−xTx)3Ga4 alloys
复制标题
(Fe1−xTx)3Ga4 合金中的磁相变
DOI：
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发表时间：
1998
期刊：
影响因子：
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通讯作者：
K. Ko
中科院分区：
文献类型：
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作者：
H. J. Al;J. Booth;K. Ko
在高场和低温下研究了 T=Ni 和 Ti 的 x 值在 0.05≤x≤0.20 范围内的过渡金属合金 (Fe1−xTx)3Ga4 系列中的磁有序性。磁化测量表明，与其他 T 替代物相比，Ni 和 Ti 对磁性能产生完全不同类型的影响。在 Ni 取代的情况下，在低成分和低温下会产生类似亚铁磁类型的磁序，而 Ti 会产生铁磁基态。对于低成分钛合金，随着温度升高，场诱导转变在约 50 K 时开始出现，这种转变持续到室温，表明从铁磁态到反铁磁态的相变。 Ni 和 Ti 系统的相图可以用 Moriya-Usami 和 Isoda 理论来解释。在 ILL 进行的镍合金的初步中子衍射测量表明，在一定范围内存在短程有序......
The magnetic ordering in the series of transition metal alloys (Fe1−xTx)3Ga4 with T=Ni and Ti having values of x in the range 0.05⩽x⩽0.20 has been investigated at high fields and low temperatures. Magnetization measurements revealed that in contrast to other T substitutions, Ni and Ti induce completely different types of effects on the magnetic properties. In the case of Ni substitution a ferrimagnetic-like type of magnetic order is induced at low compositions and low temperatures and Ti produces a ferromagnetic ground state. For Ti alloys with low composition as the temperature is increased a field induced transition starts to appear at about 50 K which persists up to room temperature suggesting a phase transition from a ferromagnetic to an antiferromagnetic state. The phase diagrams of the Ni and Ti system are explainable in terms of the Moriya-Usami and Isoda theories. Preliminary neutron diffraction measurements on the Ni alloys carried out at ILL suggest the existence of short-range order over a cert...