Mr. Mohammad Nur-E-Alam Profile

Mohammad Nur-E-Alam

at Edith Cowan Univ

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Proceedings Article | 3 December 2009 Paper

RF-sputtered Bi-substituted iron garnet composite films for visible-range magneto-optics

M. Nur-E-Alam, M. Vasiliev, K. Alameh, V. Kotov

Proceedings Volume 7631, 76311F (2009) https://doi.org/10.1117/12.850998

KEYWORDS: Garnet, Composites, Molybdenum, Bismuth, Oxides, Iron, Magnetism, Absorption, Annealing, Anisotropy

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We report on the synthesis of new magneto-optical materials with excellent optical and magneto-optical (MO) properties for visible-range and near-infrared applications. Bi-substituted composite garnet films fabricated with excess bismuth oxide content using RF co-sputtering and conventional oven-annealing processes are found to possess simultaneously a record-high MO quality and strong uniaxial magnetic anisotropy. The films demonstrate nearly-square hysteresis loops with specific Faraday rotations of up to 10.1 deg/μm at 532 nm and up to 2.6 deg/μm at 635 nm, which are significantly larger than these measured in garnet films of the same composition prepared without extra bismuth oxide content. Record-high MO figures of merit are demonstrated in our composite garnet materials due to a significant reduction in the optical absorption coefficients achieved across the visible spectral range, thus making garnet-oxide composites highly attractive for use in a range of magneto-optical applications.

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