INVESTIGADORES
CANDAL Roberto Jorge
artículos
Título:
Magnetic binarynanofillers
Autor/es:
MORALES MENDOZA N.; GOYANES S.; CHILIOTTE C.; BEKERIS, V; RUBIOLO G.; CANDAL R.J.
Revista:
PHYSICA B - CONDENSED MATTER
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Lugar: Amsterdam; Año: 2012 vol. 407 p. 3203 - 3205
ISSN:
0921-4526
Resumen:
Magneticbinarynanofillerscontainingmultiwallcarbonnanotubes(MWCNT)andhercynitewere
synthesizedbyChemicalVaporDeposition(CVD)onFe/AlOOHpreparedbythesol?gelmethod.The
catalystprecursorwasfiredat450 1C, groundandsiftedthroughdifferentmeshes.Twopowderswere
obtainedwithdifferentparticlesizes:sampleA(50?75 mm)andsampleB(smallerthan50 mm).These
powdersarecomposedofironoxideparticleswidelydispersedinthenon-crystallinematrixof
aluminumoxideandtheyarenotferromagnetic.Afterreductionprocessthepowdersarecomposedof
a-Fe nanoparticlesinsidehercynitematrix.Thesenanofillersarecomposedofhercynitecontaining a-Fe
nanoparticlesandMWCNT.Thebinarymagneticnanofillerswereslightlyferromagnetic.Thesaturation
magnetizationofthenanofillersdependedonthepowderparticlesize.Thenanofillerobtainedfrom
powderparticlesintherange50?75 mm showedasaturationmagnetization36%higherthantheone
formedfrompowderparticlessmallerthan50 mm. Thephenomenonisexplainedintermsofchanges
in themagneticenvironmentoftheparticlesasconsequenceofthepresenceofMWCNT.
