论文标题
场诱导的调制状态
Field Induced Modulated State in the Ferromagnet PrPtAl
论文作者
论文摘要
逐序（QOBD）的量子理论解释了在零场中铁磁性和promagnetism之间边界的调制磁状态的形成。 Prptal被认为为此提供了原型。在这里，我们报告了磁场中的相图，并沿着Easy $ a $ axis和硬$ b $轴进行应用。对于与$ b $轴对齐的场，我们发现磁性过渡温度被抑制，并且在低温下，有一个调制的风扇状态，将简单的$ a $ a $ a轴铁磁状态与场极化状态分开。在存在各向异性和田间的情况下，用QOBD理论很好地解释了这种风扇状态。支持QOBD解释的实验证据是由$ t^2 $的电阻率系数的大幅度增加和直接检测增强的磁波动，并在风扇状态跨越的田间范围内，无弹性中子散射。这表明QOBD机制可以解释持续到非常低温的场诱导的调制状态。
The theory of quantum order-by-disorder (QOBD) explains the formation of modulated magnetic states at the boundary between ferromagnetism and paramagnetism in zero field. PrPtAl has been argued to provide an archetype for this. Here, we report the phase diagram in magnetic field, applied along both the easy $a$-axis and hard $b$-axis. For field aligned to the $b$-axis, we find that the magnetic transition temperatures are suppressed and at low temperature there is a single modulated fan state, separating an easy $a$-axis ferromagnetic state from a field polarised state. This fan state is well explained with the QOBD theory in the presence of anisotropy and field. Experimental evidence supporting the QOBD explanation is provided by the large increase in the $T^2$ coefficient of the resistivity and direct detection of enhanced magnetic fluctuations with inelastic neutron scattering, across the field range spanned by the fan state. This shows that the QOBD mechanism can explain field induced modulated states that persist to very low temperature.
