Magnetic behavior of Ni nanoparticles with high disordered atomic

NUNES WALLACE C; EMILIO DE BIASI; MENESES CRISTIANO T; KNOBEL MARCELO; WINNISCHOFER H; ROCHA TÚLIO C. R; ZANCHET DANIELA

APPLIED PHYSICS LETTERS

AMER INST PHYSICS

Año: 2008 vol. 92 p. 1 - 3

0003-6951

This report concerns the magnetic properties of colloidal Ni nanoparticles
NPs obtained by chemical reduction of Ni
II salt in an organic solvent. The NPs present a complex and disordered atomic structure, where small clusters of a few Ni atoms appear to coexist within each NP. These NPs exhibit interesting magnetic properties, with a low temperature ferromagnetic order followed by a transition from ferromagnetic to a “spin-glass-like” state as the temperature decreases. The results are discussed considering the role of the atomic ordering of the NPs on the corresponding magnetic behavior.
NPs obtained by chemical reduction of Ni
II salt in an organic solvent. The NPs present a complex and disordered atomic structure, where small clusters of a few Ni atoms appear to coexist within each NP. These NPs exhibit interesting magnetic properties, with a low temperature ferromagnetic order followed by a transition from ferromagnetic to a “spin-glass-like” state as the temperature decreases. The results are discussed considering the role of the atomic ordering of the NPs on the corresponding magnetic behavior.
II salt in an organic solvent. The NPs present a complex and disordered atomic structure, where small clusters of a few Ni atoms appear to coexist within each NP. These NPs exhibit interesting magnetic properties, with a low temperature ferromagnetic order followed by a transition from ferromagnetic to a “spin-glass-like” state as the temperature decreases. The results are discussed considering the role of the atomic ordering of the NPs on the corresponding magnetic behavior.