Core-shell magnetic behavior of ultrathin films prepared by sputtering at very low temperatures Articles uri icon

authors

  • Jimenez Villacorta, Felix
  • Morillas, Rocio Martinez
  • SALAS COLERA, EDUARDO
  • Cespedes, Eva
  • PRIETO DE CASTRO, CARLOS ANDRES

publication date

  • December 2008

start page

  • 2792

end page

  • 2795

issue

  • 11 PART 2

volume

  • 44

International Standard Serial Number (ISSN)

  • 0018-9464

Electronic International Standard Serial Number (EISSN)

  • 1941-0069

abstract

  • We report a magnetic characterization of iron thin films of 6 nm prepared on Si (001) substrates by sputtering at different substrate temperatures. Magnetization loops and zero field cooling-field cooling measurements were performed to unveil the magnetic features of such systems. Magnetic parameters show that films prepared at very low temperature ( T S =200 K) present features of a core-shell granular systems, formed by ferromagnetic iron grains surrounded by an antiferromagnetic iron oxide phase.

keywords

  • magnetic materials; thin films