Virumbrales Maider, Saez-Puche Regino, Torralvo María José, Blanco-Gutierrez Veronica
Departamento de Química Inorgánica, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040 Madrid, Spain.
Nanomaterials (Basel). 2017 Jun 22;7(7):151. doi: 10.3390/nano7070151.
NiFe₂O₄ and ZnFe₂O₄ nanoparticles have been prepared encased in the MCM (Mobile Composition of Matter) type matrix. Their magnetic behavior has been studied and compared with that corresponding to particles of the same composition and of a similar size (prepared and embedded in amorphous silica or as bare particles). This study has allowed elucidation of the role exerted by the matrix and interparticle interactions in the magnetic behavior of each ferrite system. Thus, very different superparamagnetic behavior has been found in ferrite particles of similar size depending on the surrounding media. Also, the obtained results clearly provide evidence of the vastly different magnetic behavior for each ferrite system.
已制备出包裹在MCM（物质移动组成）型基质中的镍铁氧体（NiFe₂O₄）和锌铁氧体（ZnFe₂O₄）纳米颗粒。对它们的磁行为进行了研究，并与相同组成和相似尺寸的颗粒（制备并嵌入无定形二氧化硅中或作为裸颗粒）的磁行为进行了比较。这项研究有助于阐明基质和颗粒间相互作用在每个铁氧体系统磁行为中所起的作用。因此，发现尺寸相似的铁氧体颗粒根据周围介质的不同呈现出非常不同的超顺磁行为。此外，所得结果清楚地证明了每个铁氧体系统的磁行为存在巨大差异。
