Holmium (Ho)‐doped DyMnO₃ multiferroic compound is prepared using conventional solid‐state reaction route, and X‐ray powder diffraction analysis is conducted to confirm the single‐phase structure. Coexistence of magnetic and electric behavior in case of multiferroics is analyzed by heat capacity measurements from low temperature (2 K) to room temperature (300 K) under different magnetic fields. Herein, the existence antiferromagnetic and ferroelectric phase transitions in this compound at <10, 18, and 40 K, respectively, is revealed, which are attributed to the structural ordering or alignment of Mn³⁺ ions and R³⁺ ions. The magnetocaloric effect of this sample is also studied from heat capacity measurements. A maximum magnetic entropy change (ΔS)_M of ≈6.3 J kg⁻¹ K⁻¹ and adiabatic temperature change (ΔT)_ad of 3–4 K is achieved in 0.1Ho‐doped compound for a magnetic field change of 5 T and useful for low‐temperature magnetic refrigeration applications.

中文翻译：

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Dy0.9Ho0.1MnO3多铁的热磁性能

使用常规的固态反应路线制备掺（（Ho）的DyMnO ₃多铁化合物，并进行X射线粉末衍射分析以确认单相结构。通过在不同磁场下从低温（2 K）到室温（300 K）的热容测量，分析了多铁磁性情况下电磁行为的共存。在此，揭示了该化合物分别在<10、18和40 K下存在反铁磁和铁电相变，这归因于Mn ³⁺离子和R ³⁺离子的结构排列或排列。还通过热容测量研究了该样品的磁热效应。最大磁熵变（ΔS）在0.1Ho掺杂的化合物中实现了≈6.3J kg ^-1  K ^-1的_M和3-4 K的绝热温度变化（ΔT）_ad，磁场变化为5 T，可用于低温磁性制冷应用程序。