Crystalline Order Effects on the Magnetic Properties of Superlattices made of Cobalt Nanocrystals

8th International Conference on Fine Particle Magnetism

Lisiecki, Isabelle^1 ; Nakamae, Sawako^2

Laboratoire des Matériaux Mésoscopiques et Nanométriques, UMR CNRS 7070, Université P. et M. Curie Bât F, 4 Place Jussieu, 75005 Paris, France^1

Service de Physique de l'Etat Condensé, CNRS-URA 2464, IRAMIS/D SM/CEA-Saclay, 91191 Gif-sur-Yvette, France^2

关键词: Ac-susceptibility measurements;    Co nanocrystals;    Cobalt nanocrystals;    Crystalline order;    Energy ratio;    Nanocrystallines;    Nanocrystallinity;    Supra crystals;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/521/1/012007/pdf
DOI  :  10.1088/1742-6596/521/1/012007

来源: IOP

【 摘 要 】

We present the magnetic property evolution in long-range ordered fcc supracrystals of Co nanocrystals (NCs) induced mainly by nanocrystallinity. By increasing the nanocrystalline order of individual NCs, ac susceptibility measurements indicate a significant increase in the 'interaction-to-anisotropy' energy ratio, a trend favourable for the formation of SFM state in these 3D supracrystals.