INVESTIGADORES
TROIANI Horacio Esteban
artículos
Título:
Surfaces and local anisotropy effect in the magnetic order of Fe?Co?B nanoparticles
Autor/es:
MOLINA CONCHA; ZYSLER; TROIANI; ROMERO
Revista:
PHYSICA B - CONDENSED MATTER
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Lugar: Amsterdam; Año: 2004 p. 121 - 124
ISSN:
0921-4526
Resumen:
3 nm (FexCo1x)yB1y (0pxp1; y 0:6) nanoparticles were synthesized by chemical route. XDR and TEMmeasurement show the amorphous nature of the samples. Size distribution was characterized by light-scatteringmeasurement. Magnetization vs. magnetic field measurements at room temperature show hysteresis loop for allcompositions, typical of blocked single domains. In powder samples, room temperature coercive field and remanent arelarger for Fe- or Co-rich composition, and saturation magnetization exhibit a minimum at x ¼ 0:15: This behaviour isrelated to the composition of the different local anisotropy associated to Fe and Co ions.
