论文标题
Sigma-phase Fe68v32化合物的磁性
Magnetism of Sigma-Phase Fe68V32 Compound
论文作者
论文摘要
H-T坐标中的磁相图已从ZFC/FC磁化测量值确定为σ-FE68V32。已经证明了从顺磁到铁磁变为旋转玻璃（SG）状态的磁性的重点特征。 SG相在磁性上是异质的，因为可以鉴定两个子相，即具有强（SG-SI）和弱（SG-WI）的不可逆性。使用平均场理论定量分析了不可逆性，T_IRR和T_CROS，T_CROS，温度，ϕ_IRR = 1.6（2）和ϕ_CROS = 0.91（9）值。与Gabay-Toulouse模型达成了定性协议。等温磁化测量值指向研究样品的软磁性行为。用kouvel-fisher方法确定γ临界指数，该方法与平均场理论一致，得出γ= 1.0（1）的值。
The magnetic phase diagram in the H-T coordinates has been determined for σ-Fe68V32 from the ZFC/FC magnetization measurements. The re-entrant character of magnetism, going from paramagnetic through ferromagnetic to spin-glass (SG) states, has been evidenced. The SG phase is magnetically heterogeneous, because two sub phases can be identified i.e. with the strong (SG-SI) and the weak (SG-WI) irreversibility. The ireversibility, T_irr and the crossover, T_cros, temperatures were quantitatively analysed using the mean-field theory and ϕ_irr=1.6(2) and ϕ_cros=0.91(9) values were obtained. A qualitative agreement with the Gabay-Toulouse model was reached. The isothermal magnetization measurements point to a soft magnetic behaviour of the studied sample. The γ critical exponent was determined with the Kouvel-Fisher approach yielding the value of γ=1.0(1) in line with the mean-field theory.
