LaFe_(11.4)Al_(16)中铁磁相与反铁磁相的双相共存

Coexistence of ferromagnetic and antiferromagnetic phases in compound LaFe_(11.4)Al_(16)

通过磁场下热磁曲线的测量 ,在LaFe1 1 4 Al1 6 化合物中发现了一个在一定温区内随温度稳定的铁磁相和反铁磁相的共存亚稳态 .确定了这个亚稳态能够存在的磁场和温度范围 ,从而使LaFe1 1 4 Al1 6 化合物的磁相图更加完善 .这个亚稳态的温度稳定性能够很好地解释磁性转变的临界场随温度的变化行为 .这个双相共存亚稳态的存在 ,与LaFe1 1 4 Al1 6 中的磁性交换作用及晶格畸变所产生的边界相的稳定性有关 .

A metastable state with coexistence of ferromagnetic and antiferromagnetic phases has been confirmed in compound LaFe11.4Al1.6 by thermomagnetic curves at different external fields. The temperature behavior of the critical field could be explained by taking into consideration the metastable state. The existence of the metastable state is attributed to the exchange interactions and lattice disorder.