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  • Masood, AnsarKTH,Materialvetenskap (författare)

A New Class of Materials for Magneto-Optical Applications : Transparent Amorphous Thin Films of Fe-B-Nb and Fe-B-Nb-Y Metallic Glassy Alloys

  • Artikel/kapitelEngelska2014

Förlag, utgivningsår, omfång ...

  • 2014
  • printrdacarrier

Nummerbeteckningar

  • LIBRIS-ID:oai:DiVA.org:kth-155814
  • https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-155814URI
  • https://doi.org/10.1109/TMAG.2013.2290584DOI

Kompletterande språkuppgifter

  • Språk:engelska
  • Sammanfattning på:engelska

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Klassifikation

  • Ämneskategori:ref swepub-contenttype
  • Ämneskategori:art swepub-publicationtype

Anmärkningar

  • QC 20141113
  • Optically highly transparent, soft magnetic thin films (4-18 nm thick) of Fe-B-Nb- and Fe-B-Nb-Y-based glassy metal targets were grown on quartz substrates by pulsed laser deposition, and their optical and magneto-optical properties were investigated over the visible spectrum (400-700 nm). All the films found to be fully amorphous in structure were continuous with uniform thickness and surface morphology. Their optical transmittance in the range 50%-85% was found to be film thickness dependent over the entire visible regime. The Verdet constant (V) and Faraday rotation angle (theta(f)) for different films (similar to 4-18 nm) investigated as a function of wavelength (lambda) show considerably higher values for the films of Fe-B-Nb-Y alloy as compared with those for Fe-B-Nb films, e. g., the similar to 4 nm film of Fe-B-Nb-Y alloy exhibits V similar to 49 degrees/Oe cm and theta(f)similar to 26 degrees/mu m while it decreased to similar to 29.4 degrees/Oe and similar to 11.8 degrees/mu m, respectively, for the Fe-B-Nb alloy at lambda=611 nm. A linear relationship is found for the wavelength dependence of V and theta(f) for both alloy systems. To the best of our knowledge, these values are considerably higher than those reported for any other magneto-optic material. The films are found to be soft magnetic with a high saturation moment while their magnetic coercivity values increases with thinness of the films. The observed combination of optical and magneto-optical properties of this new class of amorphous metallic films makes them viable for multifunctional magneto-optical applications.

Ämnesord och genrebeteckningar

Biuppslag (personer, institutioner, konferenser, titlar ...)

  • Tamaki, TakahikoKTH,Materialvetenskap(Swepub:kth)u17cdlo6 (författare)
  • Ström, ValterKTH,Teknisk materialfysik(Swepub:kth)u1u6wc2n (författare)
  • Borgenstam, AnnikaKTH,Metallografi(Swepub:kth)u1ai1efe (författare)
  • Ågren, JohnKTH,Metallografi(Swepub:kth)u1jrdcr4 (författare)
  • Rao, K. VenkatKTH,Teknisk materialfysik(Swepub:kth)u1i9ssac (författare)
  • KTHMaterialvetenskap (creator_code:org_t)

Sammanhörande titlar

  • Ingår i:IEEE transactions on magnetics50:4, s. 4004005-0018-94641941-0069

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