AI Article Synopsis
- Researchers studied advanced nanocomposites made of GdO nanoparticles embedded in a porous SiO matrix, focusing on their structure and magnetocaloric properties.
- Regularly organized nanopores were observed, filled with varying concentrations of nanoparticles, showing significant magnetic entropy changes up to 70 J kg K at low temperatures without thermal hysteresis, suggesting potential for cryogenic refrigeration.
- For the first time, scaling laws were applied to analyze the magnetic entropy change data, allowing insights into the magnetic properties and phase transitions of the nanocomposite materials, even under conditions not achievable in lab settings.
Article Abstract
The series of advanced nanocomposites consisting of GdO nanoparticles (NPs) embedded into periodic porous SiO matrix have been investigated with respect to their structural and magnetocaloric properties. By means of small angle neutron scattering and transmission electron microscopy, regular nanopores organized in the cubic or hexagonal superlattice have been documented. The pores are occupied by the NPs of progressive concentration within the nanocomposite series. All of the examined systems have exhibited extraordinarily high values of magnetic entropy change (up to 70 J kg K) at low temperatures with the absence of thermal hysteresis, indicating their perspective utilization in cryogenic refrigeration. Profound analysis of magnetic entropy change data via scaling laws has been applied to the nanocomposite materials for the very first time. With the aid of scaling analysis, conclusions on magnetic properties and phase transition type have been made, even for the conditions unavailable in the laboratory.
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Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8831503 | PMC |
| http://dx.doi.org/10.1038/s41598-022-06132-8 | DOI Listing |
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