论文标题
可调磁电效应和复合样氧化物异质结构中的制冷剂能力增强
Tunable magnetocaloric effect and enhanced refrigerant capacity in composite-like oxide heterostructures
论文作者
论文摘要
我们报告了一项关于LA2NIMNO6和LA2/3SR1/3MNO3异质结构的磁化作用的详细研究。这些多层样品的磁熵变化的温度依赖性变化（$ΔS_{M} $）的形状，宽度和大小可以通过更改其布局来调整和控制。在所有样品中都观察到了宽温度范围内的大$ΔS_{M} $，超出了室温。在三层样品中，我们观察到与温度无关的桌面$ΔS_{m} $在100 k的范围内观察到的。具有多个磁相变的LA2NIMNO6双钙钛矿是调谐和塑造磁熵变化的温度依赖性的关键，以适应几个冷却周期的要求。
We report a detailed study of the magnetocaloric effect in heterostructures of La2NiMnO6 and La2/3Sr1/3MnO3. The shape, width and magnitude of the temperature dependence of the magnetic entropy change ($ΔS_{m}$) for these multilayer samples can be tuned and controlled by changing their layout. A large $ΔS_{m}$ over a wide temperature range which goes beyond room temperature is observed in all samples. We observe a temperature-independent table-top-like $ΔS_{m}$ over a temperature range as large as 100 K in the trilayer samples. La2NiMnO6 double perovskite with multiple magnetic phase transitions is the key to tuning and shaping the temperature dependence of the magnetic entropy changes to suit the requirements of several cooling cycles.
