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Comparison of Bi3Fe5O12 film giant Faraday rotators grown on (111) and (001) Gd3Ga5O12 single crystals
KTH, School of Engineering Sciences (SCI), Theoretical Physics, Condensed Matter Theory.
KTH, School of Information and Communication Technology (ICT), Material Physics, Material Physics, MF.ORCID iD: 0000-0001-8774-9302
KTH, School of Information and Communication Technology (ICT), Material Physics.
2006 (English)In: Thin Solid Films, ISSN 0040-6090, E-ISSN 1879-2731, Vol. 515, no 2, 477-480 p.Article in journal (Refereed) Published
Abstract [en]

Bismuth iron garnet (Bi3Fe5O12, BIG) epitaxial thin films were grown on single crystal (Gd3Ga5O12, GGG) (111) and (001) substrates by rf-magnetron sputtering technique. Processing parameters have been optimized to obtain high deposition rate (2.74 mu m/h) and the surface rms roughness less than 10 nm. X-ray diffraction reveals films epitaxial quality: exclusive (111) or (00 1) orientation with narrow rocking curves and strong in-plane texture. Films possess low optical loss and magneto-optical Faraday rotation (FR) as high as 5 deg/mu m at 677 nm wavelength. Comparative analysis of films grown on (111) and (001) substrates clearly shows significant superiority of BIG/GGG(001) film. For this film, the coercive field similar to 100 Oe appears to be 2.5 times lower while the optical transmission to be 10% higher than that for BIG/GGG(111) film. Enhanced magneto-optical performance of BIG/GGG(001) films relies upon better accommodation of the film-to-substrate mismatch strain through the tetragonal BIG lattice distortions compared to the rhombohedral one in BIG/GGG(111) films.

Place, publisher, year, edition, pages
2006. Vol. 515, no 2, 477-480 p.
Keyword [en]
magnetooptical effects, theory, models, and numerical simulation, optical constants (refractive index, absorption), deposition by sputtering, ferrite and garnet devices, iron-garnet, rotation
National Category
Condensed Matter Physics
URN: urn:nbn:se:kth:diva-16054DOI: 10.1016/j.tsf.2005.12.268ISI: 000241220600022ScopusID: 2-s2.0-33748757229OAI: diva2:334096
QC 20100525 QC 20110927. Conference: 12th International Conference on Thin Films. BRATISLAVA, SLOVAKIA. SEP 15-20, 2002Available from: 2010-08-05 Created: 2010-08-05 Last updated: 2011-09-29Bibliographically approved

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