Tejedor Inés, Kravchenko Dmitry E, Gandara-Loe Jesús, Ameloot Rob, Gascón Ignacio, Roubeau Olivier
Instituto de Nanociencia y Materiales de Aragón (INMA), CSIC and Universidad de Zaragoza, Zaragoza 50009, Spain.
Centre for Membrane Separation, Adsorption, Catalysis and Spectroscopy, KU Leuven, Celestijnenlaan 200F, Leuven 3001, Belgium.
Chem Mater. 2024 Aug 20;36(17):8239-8246. doi: 10.1021/acs.chemmater.4c00909. eCollection 2024 Sep 10.
Dense metal-organic frameworks with high spin paramagnetic nodes are competitive materials for cryogenic magnetic refrigeration, particularly in applications for which local cooling is advantageous. We focus on obtaining thin films of gadolinium formate, which has a large volumetric magnetocaloric effect. Continuous and homogeneous deposits of gadolinium formate are successfully formed on silicon by means of aerosol jet printing, with control over the film thickness from 0.35 μm up to 2.5 μm. The excellent cooling power of the deposits is evidenced via direct measurements of the cooling of a 200 μm silicon wafer down to sub-K temperatures by a single demagnetization from 1 T and 2 K, thereby demonstrating the potential of this approach for on-chip local magnetic refrigeration.
具有高自旋顺磁节点的致密金属有机框架是用于低温磁制冷的有竞争力的材料，特别是在局部冷却具有优势的应用中。我们专注于制备具有大体积磁热效应的甲酸钆薄膜。通过气溶胶喷射印刷成功地在硅上形成了连续且均匀的甲酸钆沉积物，可将薄膜厚度控制在0.35μm至2.5μm之间。通过直接测量一个200μm的硅晶片在1T和2K下单次退磁至亚K温度时的冷却情况，证明了沉积物具有出色的冷却能力，从而展示了这种方法用于片上局部磁制冷的潜力。
