文献类型：期刊文献

英文题名：Enhanced Ferrimagnetism, Large Magnetocaloric Effect And Magentoelectric Coupling Behavior In Mn-Doped Mnco2o4 Spinels

作者：Ti, Ruixia[1]; Wang, Chaoyang[1]; Wu, Huarui[1]; Zhang, Chenyang[2]; Sun, Shujie[3]; Su, Yun[1]; Wang, Bin[1]; Chen, Zezhang[1]; Zhang, Yi[1]; Li, Yangyang[1]; Zhang, Yan[1]

机构：[1] SchoolofPhysics andElectronic Engineering, Xinxiang University, Xinxiang, 453003, China; [2] SchoolofChemistry andMaterials Engineering, Xinxiang University, Xinxiang, 453003, China; [3] Henan Collaborative Innovation Center of Energy-Saving Building Materials, Xinyang Normal University, Xinyang, 464000, China

第一机构：新乡学院

年份：2023

外文期刊名：SSRN

收录：EI(收录号：20240017349)

语种：英文

外文关键词：Cobalt compounds - Curie temperature - Dielectric properties - Glass - Magnetization - Magnetocaloric effects - Manganese compounds - Solid state reactions - Spin glass

摘要：Polycrystalline MnCo2O4 and Mn-doped Mn1.25Co1.75O4 ceramics are successfully synthesized by solid state reaction method, and their structural, magnetic properties, magnetocaloric effect and dielectric properties are investigated systematically. It is found that both ceramics undergo a ferrimagnetic to paramagnetic phase transition, corresponding to second-order magnetic phase transition, confirmed by Arrott plots measurement. Furthermore, the observed spin glass behavior can be proofed by the isothermal remnant magnetization and memory effect. It is worth noting that the enhanced ferrimagnetism is observed in Mn1.25Co1.75O4 ceramics with higher Curie temperature of 187 K and larger remnant magnetization (2Mr) of about 33.20 emu/g at 10 K. The corresponding mechanisms could be attributed to the strong magnetic frustration owing to the competition among JAA, JBB and JAB interactions. The large magnetocaloric effect is also obtained with the maximum magnetic entropy change of 2.04 J kg-1 K-1 and relative cooling power value of 71.14 J/kg under an applied magnetic field of 5 T. Particularly, a significant dielectric anomaly appears the vicinity of the ferrimagnetic Curie temperature, exhibiting a possible magnetoelectric coupling behavior. The present work highlights the possibility of MnCo2O4-based spinels as a promising candidates for intermediate temperature magnetic refrigerants. ? 2023, The Authors. All rights reserved.