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Magnetic properties of screen‐printed (Y 0.5 Sm 0.5 )Co 5 magnet arrays
Author(s) -
BuenoBaques D.,
MaldonadoChavéz L.,
HidalgoGonzález J. L.,
CorralFlores V.,
MatutesAquino J. A.
Publication year - 2007
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200675357
Subject(s) - materials science , magnetometer , magnet , microstructure , scanning electron microscope , coercivity , nanoparticle , ferrofluid , magnetic field , isotropy , magnetic nanoparticles , composite material , nanotechnology , optics , condensed matter physics , physics , quantum mechanics
(Y 0.5 Sm 0.5 )Co 5 magnet arrays of square μdots of 300 μm were prepared by screen printing. A well controlled paste like ink prepared with the (Y 0.5 Sm 0.5 )Co 5 nanoparticles and a mixture of organic solvent and polymer was used to print different pattern arrays. (Y 0.5 Sm 0.5 )Co 5 nanoparticles were obtained by mechanical milling starting from arc melted ingots and heat treated in Ar atmosphere. Two different heat treatment were considered, resulting in powders with different magnetic properties. The microstructure of the magnet arrays was studied by scanning electron microscopy (SEM). An isotropic homogeneous distribution of the nanoparticles inside the μdots was observed. The final shape of the μdots in the array was found to be highly dependent on the squeeze pressure and speed over the mesh. Magnetic properties were studied by pulsed field magnetometry and vibrating sample magnetometry at room temperature. The micro size arrays showed lower saturation magnetization and a slightly increase in the coercive field. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)