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|Type:||Artigo de periódico|
|Title:||Complex Magnetic Internal Order In Structurally Disordered Ni Nanoparticles|
|Author:||De Biasi E.|
|Abstract:||A detailed study of the magnetic properties of colloidal Ni nanoparticles (∼5.2 nm) that do not present long range order is presented. Two magnetic contributions were observed at high temperatures (>25 K), a dominating paramagnetic one and a ferromagnetic contribution, detected by ferromagnetic resonance and low field magnetic measurements. Interestingly, the ferromagnetic behavior does not follow a classical superparamagnetic description. The effective anisotropy increases at low temperatures due to interactions among the ferromagnetic clusters, which leads the system to a frustrated state.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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