Mn1中磁弹性相变和绝热温度变化的动力学3Fe0.7P0.5Si0.55
Dynamics of the magnetoelastic phase transition and adiabatic temperature change in Mn1.3Fe0.7P0.5Si0.55
摘要：
测量了Mn 1.3Fe 0.7P 0.5Si 0.55 Fe 2 P型合金在不同磁场扫描速率（0.93 ~ 2870 Ts-1）下的绝热温度变化DTad。我们发现了一个独立于场扫描速率的磁热效应，由于部分对齐的磁矩在顺磁区域重叠的一阶相变的磁热效应。此外，一阶相变甚至在高达20 T的磁场中也未完成，导致DTad的非饱和行为。在不同的脉冲场的测量表明，一阶相变不能遵循快速的字段变化，如前所述，导致在DTad的一个明显的依赖于字段的滞后。
英文摘要：
The adiabatic temperature change DTad of a Mn1.3Fe0.7P0.5Si0.55 Fe2P-type alloy was measured under different magnetic field-sweep rates from 0.93 Ts-1 to 2870 Ts-1. We find a field-sweep-rate independent magnetocaloric effect due to a partial alignment of magnetic moments in the paramagnetic region overlapping with the magnetocaloric effect of the first-order phase transition. Additionally, the first-order phase transition is not completed even in fields up to 20 T leading to a non-saturating behavior of DTad. Measurements in different pulsed fields reveal that the first-order phase transition cannot follow the fast field changes as previously assumed, resulting in a distinct field-dependent hysteresis in DTad.
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