IFLP   13074
INSTITUTO DE FISICA LA PLATA
Unidad Ejecutora - UE
artículos
Título:
Magnetic Properties of Zn-Ferrites Obtained From Multilayer Film Deposited by Sputtering
Autor/es:
K. L. SALCEDO RODRÍGUEZ; F. GOLMAR; C. E. RODRÍGUEZ TORRES
Revista:
IEEE TRANSACTIONS ON MAGNETICS
Editorial:
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Referencias:
Lugar: New York; Año: 2013 vol. 49 p. 4559 - 4561
ISSN:
0018-9464
Resumen:
Epitaxial ZnFe O thin films were deposited onmonocrystallineMgO substrate by dc-sputtering. Ferrites were grown from Zn-O and Fe-O multilayers starting from metallic targets in oxygen atmosphere. The number and thickness of layers were varied holding constant the total thickness (50 nm) and sample stoichiometry Fe/Zn . The samples were structural and magnetically characterized by X-ray diffraction and magnetic measurements, respectively. Thin film fabricated using 20 bilayers of thickness 3 nm present a magnetic behavior similar to bulk ZnFe O , with a Néel temperature T K. The magnetic behavior of those films obtained from thicker bilayers (6 and 10 nm) is characterized by the coexistence of antiferro and ferromagnetic regions. This is probably due to the inhomogeneities in Zn and Fe distributions caused by an incomplete interdiffusion process prevented by the relatively large multilayer thickness. These inhomogeneities probably generate zinc-iron position replacements and interrupt the long-range antiferromagnetic order, giving rise to ferromagnetic clusters coexisting with the antiferromagnetic component.