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Improved growth and perpendicular anisotropy in Pd–Co multilayers with intentionally alloyed layers

Authors
Journal
Thin Solid Films
0040-6090
Publisher
Elsevier
Publication Date
Volume
371
Identifiers
DOI: 10.1016/s0040-6090(00)01000-2
Keywords
  • Magnetic Properties And Measurements
  • Multilayers
  • Electron Microscopy
  • Cobalt
Disciplines
  • Physics

Abstract

Abstract Polycrystalline Pd m -[CoPd] n multilayers were grown by e-beam evaporation on polyimide, Si and glass substrates. The number of Pd atomic layers in one multilayer period was m≈15 while the number n, of the alloyed layers ranged between 2 and 6. Transmission electron microscopy experiments confirmed the excellent multilayer growth. The grain size of the crystals was determined to be 10–30 nm. No columnar growth was observed. Super Conducting Quantum Interference Device (SQUID) magnetometry at temperatures of 10–300 K revealed a large perpendicular magnetic anisotropy with a squareness ratio of approximately 1 for all thicknesses. The film with the thinnest magnetic layers presented a reduced remanence at room temperature, which is attributed to the formation of ferromagnetic domains near the Curie temperature.

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